25 QUESTIONS MUTILPE CHOICE
mr.frrxtneeFor a sample with M = 80, a score of X = 88 corresponds to z = 2.00. What is the sample standard deviation?
Question 1 options:

2 

4 

8 

16 
For a population with μ = 80 and σ = 6, what is the zscore corresponding to X = 68?
Question 2 options:

–0.50 

–2.00 

+2.00 

–12.00 
Last week, Sarah had exams in math and in Spanish. On the math exam, the mean was μ = 30 with σ = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was μ = 60 with σ = 8, and Sarah had a score of X = 68. For which class should Sara expect the better grade?
Question 3 options:

Math 

Spanish 

The grades should be the same because the two exam scores are in the same location. 

There is not enough information to determine which is the better grade. 
You have a score of X = 65 on an exam. Which set of parameters would give you the best grade on the exam?
Question 4 options:

μ = 60 and σ = 10 

μ = 60 and σ = 5 

μ = 70 and σ = 10 

μ = 70 and σ = 5 
For a population with a mean of m = 40, a score of X = 37 corresponds to z = –0.50. The standard deviation for the population is s = 3.
Question 5 options:

True 

False 
Last week Tim got a score of X = 54 on a math exam with μ = 60 and σ = 8. He also got X = 49 on an English exam with μ = 55 and σ = 3, and he got X = 31 on a psychology exam with μ = 37 and σ = 4. For which class should Tim expect the best grade?
Question 6 options:

Math 

English 

Psychology 

All 3 grades should be the same. 
Last week Sarah had exams in math and in Spanish. On the math exam, the mean was μ = 40 with σ = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was μ = 60 with σ = 8, and Sarah had a score of X = 68. For which class should Sara expect the better grade?
Question 7 options:

Math 

Spanish 

The grades should be the same because the two exam scores are in the same location. 

There is not enough information to determine which is the better grade. 
For a population with a standard deviation of σ = 10, what is the zscore corresponding to a score that is 5 points below the mean?
Question 8 options:

z = 0.50 

z = 1.00 

z = –0.50 

z = –1.00 
For any distribution of scores, the location identified by z = +1 and the location identified by z = –1 are exactly the same distance from the mean.
Question 9 options:

True 

False 
On an exam with s = 6, Tom’s score of X = 54 corresponds to z = –1.00. The mean for the exam must be m = 60.
Question 10 options:

True 

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.
Question 11 options:

True 

False 
In a population with σ = 8, a score of X = 44 corresponds to a zscore of z = –0.50. What is the population mean?
Question 12 options:

μ = 36 

μ = 40 

μ = 48 

μ = 52 
In a sample with s = 6, a score of X = 53 corresponds to z = –0.50. The mean for this sample is M = 56.
Question 13 options:

True 

False 
For a sample with a mean of M = 50 and a standard deviation of s = 10, a zscore of z = +2.00 corresponds to X = 70.
Question 14 options:

True 

False 
For a sample with a standard deviation of s = 6, a zscore of z = –1.50 corresponds to a location that is 9 points above the mean.
Question 15 options:

True 

False 
Last week Sarah had exams in math and in Spanish. On the math exam, the mean was μ = 40 with σ = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was μ = 60 with σ = 8, and Sarah had a score of X = 68. For which class should Sara expect the better grade?
Question 16 options:

Math 

Spanish 

The grades should be the same because the two exam scores are in the same location. 

There is not enough information to determine which is the better grade. 
For a population with a standard deviation of σ = 6, what is the zscore corresponding to a score that is 12 points above the mean?
Question 17 options:

z = 1 

z = 2 

z = 6 

z = 12 
A population of scores has μ = 44. In this population, a score of X = 40 corresponds to z = –0.50. What is the population standard deviation?
Question 18 options:

2 

4 

8 

–8 
For a population with a mean of m = 60 and a standard deviation of s = 8, a score of X = 56 corresponds to z = –0.50.
Question 19 options:

True 

False 
On an exam, Tom scored 12 points above the mean and had a zscore of +2.00. The standard deviation for the set of exam scores must be s = 6.
Question 20 options:

True 

False 
Transforming an entire distribution of scores into zscores will not change the shape of the distribution.
Question 21 options:

True 

False 
A score that is 6 points above the mean corresponds to a zscore of z = +0.50. For this population, the standard deviation is s = 3.
Question 22 options:

True 

False 
For a population with m = 34, a score of X = 31 corresponds to z = –1.00. The standard deviation for the population is s = 6.
Question 23 options:

True 

False 
A positive zscore always corresponds to a score that is greater than the mean.
Question 24 options:

True 

False 
What zscore corresponds to a score that is above the mean by 2 standard deviations?
Question 25 options:

+2 

+10 

+20 

Impossible to determine without knowing the value of the standard deviation 
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