Questions from Essentials of Statistics

Q: For a sample with a standard deviation of s = 4,

For a sample with a standard deviation of s = 4, a score of X = 35 corresponds to z = -1.25. What is the sample mean?

Q: For a sample with a mean of M = 63, a

For a sample with a mean of M = 63, a score of X = 54 corresponds to z = 20.75. What is the sample standard deviation?

Q: Describe the difference in appearance between a bar graph and a histogram

Describe the difference in appearance between a bar graph and a histogram and describe the circumstances in which each type of graph is used to represent sample data. How would the same variables be r...

Q: In a population distribution, a score of X = 56 corresponds

In a population distribution, a score of X = 56 corresponds to z = -0.40 and a score of X = 70 corresponds to z = +1.00. Find the mean and standard deviation for the population. (Hint: Sketch the dist...

Q: The Graduate Record Exam is a standardized test taken by many graduating

The Graduate Record Exam is a standardized test taken by many graduating college seniors. GRE scores are often included in applications to masters or doctoral programs. Suppose that a psychology major...

Q: Your professor tells you that all exam scores were transformed to z

Your professor tells you that all exam scores were transformed to z-scores for the midterm examination. Describe the mean and standard deviation of the resulting distribution of z-scores.

Q: A sample with a mean of M = 62 and a standard

A sample with a mean of M = 62 and a standard deviation of σ = 5 is transformed into a standardized distribution with μ = 50 and s = 10. Find the new, standardized score for each of the following valu...

Q: A population consists of the following N = 7 scores: 6

A population consists of the following N = 7 scores: 6, 1, 0, 7, 4, 13, 4. a. Compute μ and σ for the population. b. Find the z-score for each score in the population. c. Transform the original popula...

Q: Identify the letters in the following distribution that correspond to the following

Identify the letters in the following distribution that correspond to the following z-scores. a. z = 12.00 b. z = 0.00 c. z = 22.00 d. z = 20.50

Q: A sample consists of the following n = 5 scores: 8

A sample consists of the following n = 5 scores: 8, 4, 10, 0, 3. a. Compute the mean and standard deviation for the sample. b. Find the z-score for each score in the sample. c. Transform the original...