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a. What is the percentage of grades that are less than 83? b. What is the percentage of grades that are greater than 65 and 89? c. What is the z-score for grade = 70?

a. What is the percentage of grades that are less than 83? b. What is the percentage of grades that are greater than 65 and 89? c. What is the z-score for grade = 70?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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3. Class problems for Chapter 2: 1) Suppose students' grades in statistics class have a symmetrical and bell-shaped distribution with a mean equal to 77 and a standard deviation of 6. Answer the following questions: a. What is the percentage of grades that are less than 83? b. What is the percentage of grades that are greater than 65 and 89? c. What is the z-score for grade = 70? d. What percentage of grades have a z-score of greater than 1?
Transcribed Image Text:3. Class problems for Chapter 2: 1) Suppose students' grades in statistics class have a symmetrical and bell-shaped distribution with a mean equal to 77 and a standard deviation of 6. Answer the following questions: a. What is the percentage of grades that are less than 83? b. What is the percentage of grades that are greater than 65 and 89? c. What is the z-score for grade = 70? d. What percentage of grades have a z-score of greater than 1?
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