Questions from Essentials of Statistics

Q: For the following set of scores: / a.

For the following set of scores: a. Place the scores in a frequency distribution table. Include columns for proportion and percentage in your table. b. n = ?

Q: In your most recent checkup, your physician listed that your height

In your most recent checkup, your physician listed that your height is 70 inches, rounded to the nearest whole inch. Why is it unlikely that your height is exactly 70 inches? What are the upper and lo...

Q: Find the z-score corresponding to X = 105 and the

Find the z-score corresponding to X = 105 and the X value corresponding to z = +0.40 for each of the following populations. a. μ = 100 and σ = 12 b. μ = 100 and σ = 4 c. μ = 80 and σ = 14 d. μ = 80 an...

Q: Find the z-score corresponding to X = 24 and the

Find the z-score corresponding to X = 24 and the X value corresponding to z = +1.50 for each of the following samples. a. M = 20 and s = 12 b. M = 20 and s = 4 c. M = 30 and s = 8 d. M = 30 and s = 10...

Q: A score that is 20 points below the mean corresponds to a

A score that is 20 points below the mean corresponds to a z-score of z = - 0.50. What is the population standard deviation?

Q: A score that is 10 points above the mean corresponds to a

A score that is 10 points above the mean corresponds to a z-score of z = +1.20. What is the sample standard deviation?

Q: For a population with a standard deviation of σ = 4,

For a population with a standard deviation of σ = 4, a score of X = 24 corresponds to z = 21.50. What is the population mean?

Q: For a population with a standard deviation of σ = 12,

For a population with a standard deviation of σ = 12, a score of X = 115 corresponds to z = +1.25. What is the population mean?

Q: For a population with a mean of μ = 45, a

For a population with a mean of μ = 45, a score of X = 54 corresponds to z = +1.50. What is the population standard deviation?

Q: You are told that the results of an extraversion assessment gave you

You are told that the results of an extraversion assessment gave you a z-score of +2.00. What does that mean about your level of extraversion relative to the mean?