What does this margin of error tell you about the percentage of adults who keep the lights on at night? We can be 95% confident that somewhere between   % and   % of adults keep the lights on at night.

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A: Hypothesis to be tested: H0:p=0.24Ha:p≠0.24 Sample proportion: p^=xn=38224=0.1696

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Q: Does it seem to you that people tend to be absent more on some days of the week than on others?…

A: Weekday f0 fE χ2=f0-fE2fE Monday 29 28 0.036 Tuesday 18 28 3.571 Wednesday 34 28 1.286…

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