Ask Question
18 February, 08:17

Sue took a test in both biology and math last week. The biology test had a mean of 70 and a standard deviation of 7 whereas the math test had a mean of 75 and a standard deviation of 10. Sue scored a 76 on the biology test and a 76 on the math test. On which test did she do better in comparison to the rest of the class? Select one:a. she did the same on each testb. the math testc. the biology testd. cannot be determined

+3
Answers (1)
  1. 18 February, 09:02
    0
    c. the biology test

    Step-by-step explanation:

    To answer this problem we need to calculate the z-score of both tests, using the formula:

    z = (x - μ) / σ

    Where x is Sue's score, μ is the mean, and σ is the standard deviation.

    For the biology test, the z-score is:

    z = (76 - 70) / 7 = 6/7 = 0.857

    For the math test, the z-score is:

    z = (76 - 75) / 10 = 1/10 = 0.100

    Because the z-score for the biology test is greater than the z-score for the math test, Sue did better in the biology test, in comparison to the rest of the class.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Sue took a test in both biology and math last week. The biology test had a mean of 70 and a standard deviation of 7 whereas the math test ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers