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 exerc 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. (a) How many people does this table describe? How many of these have played video games? (b) Give the marginal distribution of the grades. (Round your answers to two decimal places.) What percent of the boys represented in the table received a grade of C or lower?

Explanation / Answer

Marginal distribution:

A's and B's:

(730 + 201) / 1803 = 51.64%

C's:

(451 + 154) / 1803 = 33.56%

D's and F's:

(186 + 81) / 1803 = 14.81%

% of boys received C or less = 33.56% + 14.81% = 48.37%

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