Question

A couple of college students frustrated with the current class registration process decide to survey 500 random students on campus they find that 84% are also dissatisfied what is the standard deviation of this binomial distribution
a. 8.2
b. 420.0
c. 67.2
d. 0.1

Answer 1

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➷ Standard deviation = $\sqrt{(n*p)(1 - p)}$

Substitute the values in:

$\sqrt{(500 *0.84)(1-0.84)}$ = 8.1975...

This can be rounded to give an approximate answer of 8.2

The answer is option A.

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