Twenty-four pairs of adult brothers and sisters were sampled at random from a population. the difference in heights, recorded in inches (brother’s height minus sister’s height), was calculated for each pair. the 95% confidence interval for the mean difference in heights for all brother-and-sister pairs in this population was (–0.76, 4.34). what is the margin of error for the confidence interval?
O 4.34 - 0.76/2 = 1.79
O 4.34 - (-0.76)/2 = 2.55
O 4.34 - 0.76 = 3.58
O 4.34 - (-0.76) = 5.10



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