Question
In: Statistics and Probability
1.Which is relatively better: a score of 72 on a psychology test or a score of...
1.Which is relatively better: a score of 72 on a psychology test or a score of 62 on an economics test? Scores on the psychology test have a mean of 92 and a standard deviation of 12. Scores on the economics test have a mean of 63 and a standard deviation of 9.
A.The psychology test score is relatively better because its z score is less than the z score for the economics test score.
B.The economic test score is relatively better because its z score is less than the z score for the psychology test score.
C.The psychology test score is relatively better because its z score is greater than the z score for the economics test score.
D.The economics test score is relatively better because its z score is greater than the z score for the psychology test score.
2. Heights of men on a baseball team have a bell-shaped distribution with a mean of 170 cm and a standard deviation of 5 cm. Using the empirical rule, what is the approximate percentage of the men between the following values?
a.---------% of the men are between 160 cm and 180 cm.
b.----------%of the men are between 155 cm and 185 cm.
Solutions
orchestra answered 1 year agoRelated Solutions
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62.8.
What is the mean score of all of these students together? Round to
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mean of the scores of all the students =
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Nurse
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Post-test Score
A
63
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B
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90
C
76
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D
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E
90
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F
56
78
G
78
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Brand
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Score
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180
72
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78
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84
66
Phillips/O'Neill
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60
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2
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