PSY 213 - Exam 1 Quiz 4

Which set of scores has the smallest standard deviation? (11, 17, 31, 53; 5, 11, 42, 22; 145, 143, 145, 147; 27, 105, 10, 80)

145, 143, 145, 147

A sample consists of n = 16 scores. How many of the scores are used to calculate the range? (2; 4; 8; all 16)

2

A population has SS = 100 and standard deviation squared = 4. How many scores are in the population? (25; 26; 200; 400)

25

A sample of n = 25 scores has M = 20 and s2 = 9. What is the sample standard deviation? (3; 4.5; 9; 81)

3

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; less than 50; greater than 50; This is impossible to determine without additional information.)

50

The value for SS is always greater than or equal to zero. (True; False)

True

To calculate the variance for a population, SS is divided by N. (True; False)

True

To calculate the variance for a sample, SS is divided by df = n - 1. (True; False)

True

For a sample of n = 16 scores, how many scores are used to calculate the sample variance? (2; 8; 15; all 16)

all 16

A population of scores has µ = 50 and s = 5. If every score in the population is multiplied by 3, then what are the new values for the mean and standard deviation? (µ = 50 and s = 5; µ = 50 and s = 15; µ = 150 and s = 5; µ = 150 and s = 15)

µ = 150 and s = 15