According to U.S. Census estimates, there were about 20 million children between 8 and 12 years old (referred to as tweens) in the United States in 2009.A recent survey of 1,223 8- to 12-year-old children (S. Jayson, "It's Cooler Than Ever to Be a Tween," USA Today, February 4, 2009, pp. 1A, 2A) reported the following results. Suppose that the survey was based on 600 boys and 623 girls.

For each type of activity, determine whether there is a difference between boys and girls at the 0.05 level of significance.

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What Tweens Did in the Past Week Boys Girls Played a game on a video 498 243 game system Read a book for fun Gave product advice to parents Shopped at a mall 276 324 186 181 144 262