D USE THE INFORMATION BELOW TO ANSWER QUESTIONS 19 THRU 21 The U.S. government estimates that the average per capita retail sales of all adults is normally distributed with a mean of $14,600 per year and a standard deviation of $5,250. Suppose we are interested in finding the amount of money a random adult would spend to have a specific percentile in this distribution. Note: Recall that, for example, the 65th percentile corresponds to the dollar amount of per capita retail sales where 65% of the distribution is below that particular dollar amount. D Question 19 1 pts Pick the equation most appropriate to deal with the problem above. O p(x) = nCxp (1 - p)"-x O x - H = 2 Vn O Xtz- Vn O X = M + ZOQuestion 20 1 pts Select the z value that corresponds to the 70th percentile of this distribution. O z = 0.66 O z = 0.72 O z = 0.43 O z = 0.52 Question 21 1 pts Select the x value (to the nearest dollar) that corresponds to the 30th percentile of this distribution O X = $13,104 O x = $11,870 O x = $12,537 O x = $10,335