Construct a scatter plot using the year number as the x-coordinate and catalog album sales as the y-coordinate. Use 0 < x < 8 as the x-axis interval and 100 < y < 220 as the y-axis interval. a. Use the scatterplot points to find the equation of the linear regression line for the catalog album sales. Round the slope and the y-intercept to the nearest hundredth. b. What is the slope of the linear regression line? c. What are the units of the slope when it is expressed as a rate? d. Based on the linear regression line, how many millions of catalog albums would you expect in 2016? Round to the nearest tenth of a million. e. Find the correlation coefficient to the nearest hundredth. f. Describe the correlation. g. Graph the linear regression equations from problems 6 and 7 on the same set of axes. Use 0 < x < 8 as the x-axis interval and 100 < y < 220 as y-axis interval. What do you notice about the graphs? What do the graphs tell you in the context of the album sales?
> You have been asked to design a rater-training program. What types of elements would you build into the process that are specific to managers, specific to employees, and common to both?
> What is the difference between performance management and performance appraisal?
> What would an effective performance-management system look like?
> Develop a policy to inform employees of your organization’s BYOD approach to electronic devices.
> What advice would you give to a prospective expatriate regarding questions to ask before accepting the assignment?
> Many people travel to the south rim of the Grand Canyon on vacation each year. The National Parks Service keeps records of the number of vehicles entering the park. According to their website, the following table lists the total vehicles that entered the
> Use the table in Example 2 to answer these questions. a. Add a relative frequency column. Calculate the relative frequencies. Round each to the nearest thousandth. b. Which price range(s) has a relative frequency greater than 0.18 and less than 0.27? c.
> Winnie needs to travel to Los Angeles. She has decided to go by bus. She researched three different bus companies and compiled the following frequency table for all of the ticket prices available leaving on January 29.
> Kate is a professional musician. She wants to make an essential purchase of an upgraded used bass guitar for her work. She found the following prices for the same make and model bass guitar from various sellers: $699, $599, $699, $680, $590, $720, $650,
> For most people, health club membership expenses are considered discretionary. Alli lives in a big city and wants to join a health club. She researched monthly membership costs and found the following for health clubs within a 5-mile radius of her apartm
> Medications are essential expenses. DeWitt has composed a price list of antibiotics available at different pharmacies in his neighborhood. In reviewing his list, he can’t find the number of pharmacies selling the antibiotics for $8. Exa
> There are many cell phone case options on the market. This discretionary item comes in a variety of colors, materials, thicknesses, protection levels, and more. Amit runs a small business that sells computer and phone accessories. He has kept the followi
> Airline flights can be either discretionary or essential. For most people, the price you pay for where you sit in the plane is a discretionary expense. The seat map for a particular flight is shown here. There are a total of 149 seats on this flight. A
> Write the sigma notation mean formula for the 4 consecutive days that would have the lowest mean of the week.
> Round the following value / to the nearest minute. Interpret the answer in the context of the problem.
> Create a distribution of five numbers that has range 10, maximum score 20, and mean 12.
> Round the following value / to the nearest minute. Interpret the answer in the context of the problem.
> Write the sigma notation mean formula for the consecutive 3-month period that would have the highest mean of the year.
> Write the formula for the mean water bill from April through November using sigma notation and determine that mean. Round your answer to the nearest cent.
> Write the formula for the mean water bill for the first 6 months of the year using sigma notation and determine that mean. Round your answer to the nearest cent.
> Write the formula for the mean water bill for the entire year using sigma notation and determine that mean. Round your answer to the nearest cent.
> Before the last school year began, it was estimated that the average discretionary personal expenses each school year for a student attending a 4-year public college were $2,110. This past summer Ashley decided to poll seven of her friends attending a 4-
> The Super Bowl is a big money-making and money-spending event. The discretionary spending amounts on Super Bowl weekends are in the billions of dollars. Examine the chart below that lists TV viewer numbers and Super Bowl weekend-related expenses by year.
> In Application 6 for section 1-5 in the textbook, you were given the following table about discretionary personal back-to-school personal expenses. a. Determine the linear regression equation that best fits the data presented in the table. Let x represen
> The table below lists the percentage of households with an income of $100,000 or more that spent money on fitness-related activities over the course of one year as reported by statista.com. a. Without making a scatter plot, what trend do you see in the
> MoviePlay is an online movie rental service. They have a sliding price list based upon the popularity of the movies. The table below shows the rentals by price category for the month of September. Let x represent the price and y represent the number of m
> A distribution consists of 30 scores of 10 and 30 scores of 20. Find the ratio of the range to the standard deviation.
> Determine if the scatter plot below depicts a positive correlation or a negative correlation.
> During a recent summer month, airfares from Miami, FL, to Seattle, WA, were normally distributed with mean $760 and standard deviation $136. a. Sketch a normal curve and shade in the interval below $500. b. Find the z-score for a fare of $500. c. What p
> The following is a distribution of the number of individual song downloads made by students in Arlington High School’s Acoustic Café Club last year. 12, 11, 21, 43, 23, 51, 19, 22, 88, 60 a. Find the mean number of downloads per club member. b. If each c
> The table below lists all train fares quoted from Washington, DC, to Philadelphia, PA, on a given day. a. Write an algebraic expression for the percentile rank of $42. b. Write an algebraic expression for the percentile rank of $48. c. Write an algebr
> Many people travel to Florida to visit the popular theme parks there. The table below lists yearly attendance at one of those parks for 6 consecutive years. a. Add a “Relative Frequency” column to the table and deter
> A certain rail company uses a method called demand pricing for setting the prices of their seats. The price per seat starts at a fixed amount. As the train starts to fill up, the prices gradually increase. A consumer watchdog agency selected a random coa
> Write the formula for the mean cell phone bill from March to September using sigma notation and determine that mean. Round your answer to the nearest cent.
> Write the formula for the mean cell phone bill for the last six months of the year using sigma notation and determine that mean. Round your answer to the nearest cent.
> Write the formula for the mean cell phone bill for the entire year using sigma notation and determine that mean. Round your answer to the nearest cent.
> Although companies would like consumers to believe that identity theft protection is an essential expense, in reality it is discretionary. A consumer organization compared the monthly costs of similar identity theft protection plans on the market and pub
> Following are the prices of 12 tickets listed on the Ticket Racket ticket broker site for a Bruce Springsteen concert. $75, 120, 120, 145, 150, 150, 150, 175, 175, 200, 225, 275 Round your answers to the nearest hundredth. a. What is the mean ticket pric
> The New York Premier Theater is hosting a concert at which all proceeds will go to the charity. The seating chart is shown here: a. Construct a frequency distribution with column headings “Seat Type”, â€&#
> Write the sigma notation mean formula for the second semester beginning in February and determine that semester average rounded to the nearest dollar.
> Round the following value / to the nearest dollar. Interpret the answer in the context of the problem.
> Write the sigma notation mean formula for the 3 consecutive month period that would have the highest mean of the year.
> In the Really? Really! section of this chapter on page 3, you examined how average Americans spend their leisure time. Often, when we look back at our leisure time we view it as “time well spent” because we engaged in
> The number of days each licensed driver in Marion County uses a commuter rail line annually is normally distributed with mean 66 and standard deviation 21. a. How many days must a driver use a commuter rail line annually to be in the top 5% of rail users
> Boaters at Springs Creek Marina have the option to rent fishing rods. The table below shows the number of boat owners that rented fishing rods last Labor Day weekend. The marina wants to compile some summary statistics for the weekend. a. How many boat
> Splash City Water Park has 14 different rides. Kerry and Kyra are planning a trip to the park. Their tickets are discounted if they agree to only go on eight different rides together. How many different combinations of rides can they choose?
> The summer income of the 3,408 students at Van Buren High School last year was normally distributed with mean $1,751 and standard deviation $421. a. Approximately what percent of the students had incomes between $1,000 and $2,000? Round to the nearest pe
> The table on the bottom, from the Statistical Abstract of the United States, shows amusement park attendance at the top 15 amusement parks for given years. a. Find the mean attendance, in thousands, for the 5 years shown, to the nearest integer. b. Find
> The number of cars owned by households in the Lakebridge Condominium Complex is shown in the table. Find the mean number of cars owned per household a. Fill in the missing entries in the table to the nearest hundredth. b. Find the standard deviation of
> Discretionary music purchases are a big business. Albums can be downloaded, streamed, played from a CD, played on vinyl, and more. What types of albums are being purchased in the United States? Music albums can be classified as current or catalog albums.
> The following table shows the number of times Key Club students at Peconic High School went to Echo Beach last summer. a. How many students are in the Key Club? b. Find the mean, median, mode, range, variance, and standard deviation for the distribution.
> Since vacation travel is a discretionary expense, consumers want to make the most out of the money they have budgeted. They often check travel websites for hotel ratings before making any reservations. A popular travel website offers travelers the opport
> The senior class is planning a graduation trip. The trip committee surveyed the 250 seniors asking the amount they were willing to spend on the entire trip. The survey results are shown in this table. a. Extend the table to include the columns â
> The following table lists the amount of discretionary spending by college students from 2008 to 2013 in billions of dollars. a. Write the formula for the mean yearly college student discretionary spending amount over the 6-year period using sigma notat
> Jack wants to buy a pair of name-brand headphones on a popular auction website. He enters the brand, make, and model number and searches the site for what is available. He notices that some headphones are being offered as “buy now” with a fixed price and
> In their brochure, AutoNation Career School estimated the average discretionary personal expenses for a student attending to be $2,850. Martin is a student and feels that the amount is too high. He polled his co-students and made a list of their actual s
> According to the Bureau of Economic Analysis, the monthly percentage change of disposable income in the United States over the course of a year from February to February was reported as follows: 0.3% 0% 0.6% 0.5% 0.5% 0.4% 0.3% 0.2% 0.3% 0.2% 0.3% 0.4% 0
> Carla is a carpenter. She wants to purchase new high-quality tools for her business. She found the following prices for the exact same set of tools from various sellers: $6,700 $7,450 $8,000 $7,600 $7,450 $8,200 $7,210 a. What is the mean price? Round yo
> Round the following value / to the nearest dollar. Interpret the answer in the context of the problem.
> For most people, the cost of a subscription to streaming music services is definitely a discretionary expense. Marshal researched subscription costs and found the following rates for streaming services: $10/mo., $6/mo., $33/year, $3/mo., $5/mo., $10/mo.,
> Describe each of the following correlation coefficients using the terms strong, moderate, or weak and negative, or positive. a. 0.21 5r b. 0.87 52r c. 0.55 5r d. 0.099 52r e. 0.99 5r f. 0.49
> Over the past 4 years, Reggie noticed that as the price of a slice of pizza increased, her college tuition also increased. She found the correlation coefficient was 0.49 5r . a. Which of the following scatter plots most accurately displays Reggieâ&
> Examine each scatter plot. Identify each as showing a positive correlation, a negative correlation, or no correlation. а. b. с. d. е. f.
> You get paid on the first day of each month. You cash your check and pay all of your essential expenses. You keep the balance in your “discretionary spending” envelope. A scatter plot shows the number of days that have passed since you were paid and the
> The table gives the number of songs purchased from MyTunes at different prices per song. a. Find the equation of the linear regression line. Round the slope and the y-intercept to the nearest hundredth. b. What is the slope of the linear regression line?
> Is it possible for a linear regression line to go through every point on a scatter plot? Is it possible for a linear regression line to not go through any point on a scatter plot? Explain.
> Interpret the quote in terms of what you have learned about essential and discretionary expenses.
> Using the data from question 2, you can compute the mean food and lodging cost of a 10-day vacation by multiplying the per-day mean by 10. The standard deviation for the 10-day vacation can be found by multiplying by 10 also. a. What is the mean for food
> Getaway Sports is a vacation destination for the serious sports fanatic. Rajesh is in charge of equipment for the complex. The last shipment of ping pong balls was normally distributed with a mean weight of 2.7 grams and a standard deviation of 0.1 gram.
> A high school theater production had an admission price of $10. During the show, 876 people paid to enter. a. What is the range of the distribution of admission fees? b. What is the standard deviation of the distribution of admission fees? c. If the stan
> Interpret the quote in terms of what you have learned about essential and discretionary vacation expenses.
> Janine is analyzing spending habits of students in her high school. She finds a mean monthly discretionary expense of $70 spent on having meals out with friends. The standard deviation of a distribution is 5. What is the variance?
> The variance of a distribution is 195. What is the standard deviation, rounded to the nearest thousandth?
> The mean of a distribution of selected theme park admission prices is $59 with a standard deviation of $3.99. The mean cost of a distribution of a specific home stereo system sold at many different stores is $1,499 with a standard deviation of $4. a. Whi
> Sixteen men and sixteen women purchased magazine subscriptions. The distribution of prices had the same mean, minimum score, and maximum score. The red markings on each number line below show where their prices fell. a. What is
> Use the round-trip airfare table in problem 5 above to determine the percentile rank of $1,133. Data from problem 5: Maria and Don Papace are flying to Florida to explore the possibility of moving there. They will be traveling with their two teenage so
> Seaquoia River Cruises offers a 7-day travel package. The prices vary based on the room class booked, as indicated in the following spreadsheet: Write the spreadsheet formulas for the indicated cells. a. C9 b. D3 c. D7 d. E4 e. F5 A В D F Number Re
> Use the cruise ship room price table in problem 7 above to determine the percentile rank of $6,962. Data from problem 7: Seaquoia River Cruises offers a 7-day travel package. The prices vary based on the room class booked, as indicated in the following
> Explain how the quote can be interpreted in light of what you have learned in this section.
> Nick and Liz have decided to move from the city to the suburbs. This means that they will have to make the essential purchase of a car in order to get to work. They researched used 2-year-old cars of the same make, model, condition, and equipped with the
> Jim lives in San Francisco and attends school at a university in New York City. He wants to travel home for his sister’s wedding next month and has researched round trip airfares. The table lists all available itineraries with fares bel
> Interpret the quote in terms of what you have learned about essential and discretionary expenses.
> In each situation of bivariate data there is causation, so the variables can be named explanatory and response variables. Identify each explanatory variable and response variable. a. number of days worked, amount earned b. amount earned in the year, inc
> Lori created a scatter plot where the explanatory variable was the side of a square, and the response variable was the perimeter of the square. Is the data positively or negatively correlated? Explain.
> Describe each of the following correlation coefficients using the terms strong, moderate, or weak and negative or positive. a. r = –0.19 b. r = –0.93 c. r = 0.57 d. r = 0.0999 e. r = –0.97 f. r = –0.45
> Each month you have $200 automatically deposited from your checking account into a discretionary savings account. Your plan is to leave the money in this account for the next 10 years in order to use the total at that time at your discretion. A scatter p
> The school nurse at West Side Elementary School weighs all of the 230 children by the end of September. She finds that the students’ weights are normally distributed with mean 98 and standard deviation 16. After compiling all the data, she realizes that
> Travel Times Journal found that the average per person cost of a 10-day trip along the Pacific coast, per person, is $1,015. This includes transportation, food, lodging, and entertainment. a. If the data is normally distributed with standard deviation $1
> What z-score on the Normal Curve table has an area of 0.6808 to its right?
> What z-score on the Normal Curve table has an area of 0.8849 to its left?
> A certain amusement park ride requires riders to be at least 48 inches tall. If the heights of children in a summer camp are normally distributed with mean 52 and standard deviation 2.5, how many of the 140 campers will be allowed on the ride? Round to t
> Tesa lives in a major city. Her employer pays for her round trip taxicab fare from home to work each day. She must keep receipts for each trip and turn them in at the end of each month for reimbursement. The fares are based on distance and time so they c
> The Vacation Times website rates recreational vehicle campgrounds using integers from 0 to 15. Last year they rated over 1,000 campsites. The ratings were normally distributed with mean 7.6 and standard deviation 1.7. a. How high would a campsite’s ratin
> A family of two adults and two children on vacation in the United States will pay an average of $247 per day for food and lodging with a standard deviation of $60 per day, according to a recent survey by a national travel association. a. Find, to the nea
> A distribution is normal with mean 60 and standard deviation 8. Find the area of each of the following shaded regions to four decimal places. b. 52 60 60 64 0.1587 0.3085 C. d. 48 60 48 60 80 0.9332 0.9270
> A travel agency did a survey and found that the average local family spends $1,900 on a summer vacation. The distribution is normally distributed with standard deviation $390. a. What percent of the families took vacations that cost under $1,500? Round t
> A class of 31 students averaged 82 on a recent exam. Two students were absent and took the exam the next day. The two students averaged 88 on their exam. What was the average for the entire class, including the two students who took the test one day late
> Look at the original data in problem 6. Suppose the number 60 was changed to 600 and the rest of the numbers remained the same. a. Would the mean be affected? b. Would the median be affected? c. Would the range be affected? d. Would the standard deviatio
> The distribution of cell phone bills for families in Smithtown North High School has mean $183 and standard deviation 11. At Smithtown South High School, the mean is $181 and the standard deviation is 21. Which distribution is more spread out?
> Four car rental prices were quoted for a 1-day rental. The frequencies are listed. Let Y represent the frequency of the $83 price quote. Use the information shown in the chart to write algebraic expressions for the entries labeled a–e.
