Concept explainers
a.
Find and interpret the 95% confidence interval for the percent of people that smoke.
b.
Find and interpret the 99% confidence interval for the average number of grams of fiber per day that people eat.
Write the best estimate, the margin of error and the confidence interval.
c.
Find and interpret the 90% confidence interval for the average number of grams of fat per day that people eat.
d.
Check whether there is evidence of a difference in the percent of current smokers by gender.
e.
Check whether there is evidence of a difference in the mean cholesterol level of males and females.
f.
Check whether there is evidence of a difference in the mean level of beta-carotene in the blood between smokers and non-smokers.
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Statistics - Unlocking The Power Of Data - Second Edition
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