Ask Question
8 November, 11:22

The scores on a statistics exam have a normal distribution and have a mean of 99 and a standard deviation of 11. One individual's score is 128. Find the z-score of this value.

+5
Answers (1)
  1. 8 November, 11:43
    0
    2.64

    Step-by-step explanation:

    The z score is calculated as

    z = (x-mean) / Sd

    The mean of scores of statistics exam=μ=99

    The standard deviation of scores of statistics exam=σ=11

    Individual's score in statistics exam=x=128

    z=128-99/11=29/11=2.64

    Hence, the z score of individual score is 2.64.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “The scores on a statistics exam have a normal distribution and have a mean of 99 and a standard deviation of 11. One individual's score is ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers