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6 November, 20:16

Suppose that, based on a sample, the 95%% confidence interval for the mean of a population is (21,37). What is the value of s/√n?

A. 4

B. 3

C. 5

D. 2

+3
Answers (2)
  1. 6 November, 20:33
    0
    A. 4

    Step-by-step explanation:

    Based on a sample, the 95%% confidence interval for the mean of a population is (21,37). Therefore, the value of s/√n is 4.
  2. 6 November, 21:18
    0
    A. 4

    Step-by-step explanation:

    s/√n is the sample standard deviation. 95% is approximately between ±2 standard deviations, so the ends of the interval are 4 standard deviations apart.

    s/√n = (37 - 21) / 4

    s/√n = 4
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