Which is relatively better: a score of 73 on a psychology test or a score of 41 on an economics test? scores on the psychology test have a mean of 86 and a standard deviation of 15. scores on the economics test have a mean of 48 and a standard deviation of 7.choose the correct answer below.(a) the economics test score is relatively better because its z score is less than the z score for the psychology test score.(b) the psychology test score is relatively better because its z score is less than the z score for the economics test score.(c) the economics test score is relatively better because its z score is greater than the z score for the psychology test score.(d) the psychology test score is relatively better because its z score is greater than the z score for the economics test score.

The correct option is: (D) The psychology test score is relatively better because its z score is greater than the z score for the economics test score.

Step-by-step explanation:

Consider the provided information.

For psychology test:

Scores on the psychology test have a mean of 86 and a standard deviation of 15.

Use the Z score test as shown:

Substitute x=73, μ=86 and σ=15 in the above formula.

For economics test:

Scores on the economics test have a mean of 48 and a standard deviation of 7.

Use the Z score test as shown:

Substitute x=41, μ=48 and σ=7 in the above formula.

The Z score of psychology test is greater than the Z score of economic test.

Thus, the correct option is: (D) The psychology test score is relatively better because its z score is greater than the z score for the economics test score.

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step-by-step explanation: