Question 1

The hip width x of adult females is normally distributed with a mean of 3 cm and a standard deviation of 4.31 cm. The minimum width of an aircraft seat that will accommodate 98% of all adult women is about: O 51.2 cm O 48.0 cm 40.5 cm O 42.6 cm O 47.2 cmAccording to the U. S. Center for Health Statistics, the probability that a randomly selected twenty-year-old will live to age 65 is 80%. A club has 25 members aged twenty. What are the chances that at least one-fourth of them will die before their 65th birthdays? O 26.6% O 50%% O 65% O 25% O 28.8%To estimate the mean retail price of designer jeans, a buyer sampled 1'? retailers in New York City and recorded the selling price of the jeans. The following statistics were reported: it = 51.75 dollars, and .s = 5.5 dollars. Assuming the prices at different retailers are normally distributed, a 9?% confidence interval for the mean is closest to: D [4112, 5:138] Cl [48.12.5538] Ci [48.5D,55.D] Cl [5121.25.53] O [4149, 5st: 1]