Measures of the Spread of the Data · Exercise 24

Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follows:

$$\begin{array}{cc}\text{Number of Movies}& \text{Frequency}\\ \text{0}& \text{5}\\ \text{1}& \text{9}\\ \text{2}& \text{6}\\ \text{3}& \text{4}\\ \text{4}& \text{1}\end{array}$$

(a) Find the sample mean.
(b) Find the approximate sample standard deviation, s.

OpenStax, Statistics · §2.7 Measures of the Spread of the Data · Exercise 24