STAT EXAM 1 - CHAP 4 Theory Q

A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

2

The smallest score in a population is X = 5 and the largest score is X = 10. Based on this information, you can conclude that ______.

the population mean is between 5 and 10, and the standard deviation is less than 6

Which of the following symbols identifies the population standard deviation?

σ

A sample of n = 8 scores has SS = 50. If these same scores were a population, then the SS value for the population would be _____.

50

Which of the following is true for most distributions?

Around 70% of the scores will be located within one standard deviation of the mean

For a sample of n = 16 scores, how many scores are used to calculate the sample variance?

all 16

If sample variance is computed by dividing SS by df = n - 1, then the average value of the sample variances from all the possible random samples will be _______ the population variance.

exactly equal to

Which of the following symbols identifies the sample variance?

s^2

There is a 6-point difference between two sample means. If the two samples have the same variance, then which of the following values for the variance would make the mean difference easiest to see in a graph showing the two distributions.

s^2 = 2

If sample variance is computed by dividing SS by n, then the average value of the sample variances from all the possible random samples will be _______ the population variance.

smaller than

For a particular sample, the largest distance (deviation) between a score and the mean is 11 points. The smallest distance between a score and the mean is 4 points. Therefore, the standard deviation _____.

will be between 4 and 11

For a population with μ = 60, which of the following values for the population standard deviation would cause X = 68 to have the most extreme position in the distribution?

σ = 1

On an exam with a mean of μ = 70, you have a score of X = 75. Which of the following values for the standard deviation would give you the highest position within the class?

σ = 1

On an exam with a mean of μ = 70, you have a score of X = 65. Which of the following values for the standard deviation would give you the highest position within the class?

σ = 10