In a large section of a statistics​ class, the points for the final exam are normally​ distributed, with a mean of 72 and a standard deviation of 7. Grades are assigned such that the top​ 10% receive​ A's, the next​ 20% received​ B's, the middle​ 40% receive​ C's, the next​ 20% receive​ D's, and the bottom​ 10% receive​ F's. Find the lowest score on the final exam that would qualify a student for an​ A, a​ B, a​ C, and a D. The lowest score that would qualify a student for an A is________  (Round up to the nearest integer as​ needed.) The lowest score that would qualify a student for a B is_______  (Round up to the nearest integer as needed.) The lowest score that would qualify a student for a C is ______   (Round up to the nearest integer as needed.) The lowest score that would qualifty a student for a D is______  (  Round up to the nearesr integer as needed.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 22PFA
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In a large section of a statistics class, the points for the final exam are normally distributed, with a mean of 72 and a standard deviation of 7. Grades are assigned such that the top 10% receive A's, the next 20% received B's, the middle 40% receive C's, the next 20% receive D's, and the bottom 10% receive F's. Find the lowest score on the final exam that would qualify a student for an A, a B, a C, and a D.

The lowest score that would qualify a student for an A is________  (Round up to the nearest integer as needed.)

The lowest score that would qualify a student for a B is_______  (Round up to the nearest integer as needed.)

The lowest score that would qualify a student for a C is ______   (Round up to the nearest integer as needed.)

The lowest score that would qualifty a student for a D is______  (  Round up to the nearesr integer as needed.) 

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