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9.8 Confidence Interval to Compare Two Population Means: Matched-Pair Experiments
A researcher suspects that men, if given the chance, would lie about their heights. She suspects that they would try to say they are taller than they really are. To test this, the researcher first asks the male subjects to report their heights, and then she actually measures them. The subjects do not know they will be measured. Use the data below to construct a 95% confidence interval for the true between measured heights and reported heights. Is zero in the interval? If so, what does this tell us?
Reported height 68 71 63 70 71 60 65 64 54 63 66 72
Measured height 67.9 69.9 64.9 68.3 70.3 60.6 64.5 67 55.6 74.2 65 70.8
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