Questions from Business Statistics

Q: According to CBS Money Watch, the average monthly household cellular phone

According to CBS Money Watch, the average monthly household cellular phone bill is $100. Suppose monthly household cell phone bills are normally distributed with a standard deviation of $11.35. a) Wha...

Q: According to the Internal Revenue Service, income tax returns one year

According to the Internal Revenue Service, income tax returns one year averaged $1,332 in refunds for taxpayers. One explanation of this figure is that taxpayers would rather have the government keep...

Q: Develop a frame for the population of each of the following research

Develop a frame for the population of each of the following research projects. a) Measuring the job satisfaction of all union employees in a company. c) Interviewing passengers of a major airline abou...

Q: Give an example of how judgment sampling could be used in a

Give an example of how judgment sampling could be used in a study to determine how district attorneys feel about attorneys advertising on television.

Q: An increasing number of consumers believe they have to look out for

An increasing number of consumers believe they have to look out for themselves in the marketplace. According to a survey conducted by the Yankelovich Partners for USA WEEKEND magazine, 60% of all cons...

Q: Give an example of how convenience sampling could be used in a

Give an example of how convenience sampling could be used in a study of Fortune 500 executives to measure corporate attitude toward paternity leave for employees.

Q: Give an example of how quota sampling could be used to conduct

Give an example of how quota sampling could be used to conduct sampling by a company test marketing a new personal computer.

Q: A population has a mean of 50 and a standard deviation of

A population has a mean of 50 and a standard deviation of 10. If a random sample of 64 is taken, what is the probability that the sample mean is each of the following? a) Greater than 52 b) Less than...

Q: A population is normally distributed, with a mean of 23.

A population is normally distributed, with a mean of 23.45 and a standard deviation of 3.8. What is the probability of each of the following? a) Taking a sample of size 10 and obtaining a sample mean...

Q: Suppose a random sample of size 36 is drawn from a population

Suppose a random sample of size 36 is drawn from a population with a mean of 278. If 86% of the time the sample mean is less than 280, what is the population standard deviation?