1. True or False: For a sample with a standard deviation of s= 8, a score of X =

Question

1. True or False: For a sample with a standard deviation of s= 8, a score of X = 42 Corresponds to Z = -0.25. The mean for the sample is M =40

2. True or False: For a sample with a mean of M =76, a score of X = 72 corresponds to Z = -0.50. The sample standard deviation is S= 8

3. True or False: If an entire population of N = 20 scores is transformed into z- scores, the set of 20 z- scores will EX =0.

4. True or False: For a population with a mean of u = 40, a score of X = 37 corresponds to Z= -0.50. The standard deviation for the population is o = 3.

5. True or False: On an exam, Tom scored 12 points above the mean and had a Z- score of +2.00. The standard deviation for the set of exam scores must o = 6

Explanation / Answer

Z = ( X - mean) / standard deviation

1) z = ( 42-40)/8 = 0.25

False

2) Z = (72-76)/8 = -0.5

True

3) True

4) Z = (37-40)/3 = -1

False

5) True

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