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HW Score: 6105%, 21. 37 of 35 pts
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Here are summary statistics for randomly selected weights of newborn girls: n 194 = 33.9 hgs = 78 ng Construct a confidence interval estimate of the mean Use a 90% confidence level Are these results very different from the
confidence interval 322 hg <<35 4 hg with only 14 sample values, X = 33.8 hg, and s = 3.4 hg?
What is the confidence interval for the population mean?
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The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?