The popularity of computer, video, online, and virtual reality games has raised

Question

The popularity of computer, video, online, and virtual reality games has raised concerns about their ability to negatively affect youth. The data in this exercise are based on a recent survey of 14- to 18-year-olds in a state's high schools. Here are the grade distributions of boys who have and have not played video games. Grade Average A's and B's C's D's and F's 460 145 200 Played games Never played games 729 201 (a) How many people does this table describe? people 1823 How many of these have played video games? people 1389 (b) Give the marginal distribution of the grades. (Round your answers to two decimal places.) Grade A's and B's C'S D's and F's Percent What percent of the boys represented in the table received a grade of C or lower? (Round your answer to two decimal places.)

Explanation / Answer

here dividing each cell by row total:

% received a graade C or lower =48.99%

total A's and B's 51.01% C's 33.19% D's and F's 15.80%

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