Answer
(a) 0.1498
(b) 0.3619
(c) 0.17776
(d) No unusual events because all are greater than 0.05
Work Step by Step
Input in Graphing Calculator
normalcdf(upper, lower, mean, standard deviation)
(a) normalcdf(10, 16, 21.1, 5.3) = 0.1498
(b) normalcdf(19, 24, 21.1, 5.3) = 0.3619
(c) normalcdf(26, 100, 21.1, 5.3) = 0.1776
(d) answer given above