Measures of the Center of the Data · Try It 5

Maris conducted a study on the effect that playing video games has on memory recall. As part of her study, she compiled the following data:

$$\begin{array}{cc}\text{Hours Teenagers Spend on Video Games}& \text{Number of Teenagers}\\ \text{0–3.5}& \text{3}\\ \text{3.5–7.5}& \text{7}\\ \text{7.5–11.5}& \text{12}\\ \text{11.5–15.5}& \text{7}\\ \text{15.5–19.5}& \text{9}\end{array}$$
What is the best estimate for the mean number of hours spent playing video games?

OpenStax, Statistics · §2.5 Measures of the Center of the Data · Try It 5