Suppose that a psychologist studying cognitive development in children developed a puzzle that is designed to test logical reasoning. Sixty-two percent of all 10-year-olds who attempt the puzzle complete it within 12 minutes. She suspects that engaging in physical activity may have an impact on how children perform at a logical reasoning task. To test this, she selects a random sample of 120 10-year-olds and finds, after a half hour of physical activity, 63.3% complete the logical reasoning puzzle within 12 minutes. She plans to use this information to conduct a one-sample z-test for a proportion 

What claim is she testing? 

The proportion of 10-year-olds who complete the puzzle within 12 minutes after engaging in physical activity differs from 61.3% 

The proportion of 10-year-olds who complete the puzzle within 12 minutes is 59%. 

The proportion of 10-year-olds who complete the puzzle within 12 minutes after engaging in physical activity is 61.3%. 

The proportion of 10-year-olds who complete the puzzle within 12 minutes after engaging in physical activity is 59%. 

The proportion of 10-year-olds who complete the puzzle within 12 minutes after engaging in physical activity differs from 59%.

Answer rating: 100% (QA)

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