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MAVERICK [17]
3 years ago
13

In History, you earned an exam score of X-85 where the exam average was μ-65 with a standard deviation of σ-5. In Biology, you e

arned an exam score of X-90 where the exam average was μ י 85 with a standard deviation of σ-10. In which class did you score better compared to your classmates?
A. Biology
B. No answer text provided.
C. You did equally well in both classes.
D. History
Mathematics
1 answer:
topjm [15]3 years ago
4 0

Answer: D. History

Step-by-step explanation:

To answer this question, we need to use the z-score formula written below:

\frac{x-pop. mean}{stan. devi.}

Now we'll just plug in the numbers and solve.

History:

\frac{85-65}{5}  = 4

Biology:

\frac{90-85}{10} =0.5

As we can see, history wields a higher z-score than biology, thus leaving us with option D. History

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