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. Question 19 1 pts Pick the equation most appropriate to deal with the problem above. O p(x) = * Cap* (1 -p)"-z Oitz O Question 20 1 pts Select the z value that corresponds to the 80th percentile of this distribution. O z = 0.73 O z = 0.92 O z = 0.68 O z = 0.84 Question 21 1 pts Select the x value (to the nearest dollar) that corresponds to the 10th percentile of this distribution. O x = $9,127 O x = $7,880 O x = $8,863 O x = $6,745