Question

A drawer contains 4 capsules numbered 2, 3, 5, and 8. A sample of size 3 is drawn with replacement. What is the standard deviation of x-bar?

Answer 1

Thank you for asking this question. Here is your answer:

For answering this question, first of all you will calculate the standard deviation of x-bar.

And after that we will solve it:

Σx = 89.9x

Σx/n = 89.9/20 ≅ 4.5Σ (x-x)²

= 30.41s.d

= √Σ(x-x)²/ n

= √30.41/20

= √1.52051.23 is the final answer for this question

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