Ask Question
24 January, 04:45

The standard deviation of a data set is 4. What is the variance ?

a. 2

b. 4

c. 8

d. 16

+5
Answers (1)
  1. 24 January, 05:52
    0
    D. 16

    Step-by-step explanation:

    We know that the standard deviation is the square-root of variance. (+ve sqrt)

    Therefore, the variance = (S. D) ^2 = 16

    And now ... we go for the second question ...

    The z score for a person with marks x is given by (x-mean) / (SD)

    Putting in the known values,

    Required z-score = (7-13) / 4 = - 6/4 = - 1.5
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “The standard deviation of a data set is 4. What is the variance ? a. 2 b. 4 c. 8 d. 16 ...” 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