Questions from Essentials of Statistics

Q: A sample of n = 64 scores has a mean of M

A sample of n = 64 scores has a mean of M = 68. Assuming that the population mean is μ = 60, find the z-score for this sample: a. If it was obtained from a population with σ = 16 b. If it was obtained...

Q: A population forms a normal distribution with a mean of μ =

A population forms a normal distribution with a mean of μ = 85 and a standard deviation of σ = 24. For each of the following samples, compute the z-score for the sample mean. a. M = 91 for n = 4 score...

Q: Scores on a standardized reading test for fourth-grade students form

Scores on a standardized reading test for fourth-grade students form a normal distribution with μ = 71 and σ = 24. What is the probability of obtaining a sample mean greater than M = 63 for each of th...

Q: Scores from a questionnaire measuring social anxiety form a normal distribution with

Scores from a questionnaire measuring social anxiety form a normal distribution with a mean of μ = 50 and a standard deviation of σ = 10. What is the probability of obtaining a sample mean greater tha...

Q: A normal distribution has a mean of μ = 58 and a

A normal distribution has a mean of μ = 58 and a standard deviation of σ = 12. a. What is the probability of randomly selecting a score less than X = 52? b. What is the probability of selecting a samp...

Q: A population has a mean of μ = 30 and a standard

A population has a mean of μ = 30 and a standard deviation of σ = 8. a. If the population distribution is normal, what is the probability of obtaining a sample mean greater than M = 32 for a sample of...

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

For the following set of scores: a. Organize the scores in a frequency distribution table. b. Based on the frequencies, identify the shape of the distribution.

Q: Suppose that all possible n = 50 samples are selected from a

Suppose that all possible n = 50 samples are selected from a population. How would the mean, standard deviation, and shape of the resulting sampling distribution compare to a sampling distribution bas...

Q: By definition, jumbo shrimp are those that require between 10 and

By definition, jumbo shrimp are those that require between 10 and 15 shrimp to make a pound. Suppose that the number of jumbo shrimp in a 1-pound bag averages μ = 12.5 with a standard deviation of σ =...

Q: For a population with a mean of μ = 72 and a

For a population with a mean of μ = 72 and a standard deviation of σ = 10, what is the standard error of the distribution of sample means for each of the following sample sizes? a. n = 4 scores b. n =...