(P Take a Test Pedro Giron Google Chrome Quizzes & Tests Secure h ps://www. math
ID: 3179030 • Letter: #
Question
(P Take a Test Pedro Giron Google Chrome Quizzes & Tests Secure h ps://www. mathxl.com Test aspx?testld 1512147998ucenterwin yes /Student/Player C openvellu Math 123 DL Spring 2017 Quiz: Chapter 5 Quiz MyStatLab This Question 1 pt 5 of 10 (4 complete) O My Courses Course Home The time spent in days) wa ng for a heart transplant in two states for patients with type A blood can Homework be approximated by a normal distribution, as shown in the graph to the right. Complete parts (a) and (b) below. Quizzes & Tests Study Plan Gradebook Stat Crunch (a) What is the shortest time spent waiting for a heart that would still place a patient in the top 25% of waiting times? days (Round to two decimal places as needed.) Chapter Contents (b) What is the longest time spent waiting for a heart that would still place a patient in the bottom 25% of waiting times? Tools for Success days (Round to two decimal places as needed.) Multimedia Library Purchase Options Pearson Tutor Services Enter your answer in each of the answer boxes. Discussions Course Tools 1:59pm WE N Ask me anything Pedro Giron & 3/19/17 7:20 PM Pedro O Submit Quiz This Quiz: 10 pts possible urse Calendar 65 200 Gradebook See Score See score See score see score 77.5% 6:20 PM 3/19/2017Explanation / Answer
mean = 131 ,SD = 19.4
looking up a z- table
a)
z- value for top 25% waiting time = +0.6745
shortest time for top 25% waiting = mean + 0.6745 * SD
= 131 + .6745 * 19.4
= 144.08
b)
z-value for bottom 25% waiting time = - .6745
longest time for bottom 25% waiting = mean - 0.6745 * SD
= 131 - 0.6745 * 19.4
= 117.91
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.