Tuesday, February 26, 2013
Ch 24 Question 1
1. Resting pulse rates for a random sample of 26 smokers had a mean of 80 beats per
minute (bpm) and a standard deviation of 5 bpm. Among 32 randomly chosen nonsmokers,
the mean and standard deviation were 74 and 6 bpm. Both sets of data were roughly
symmetric and had no outliers. Is there evidence of a difference in mean pulse rate between
smokers and non-smokers? How big?
Tuesday, February 19, 2013
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