A large group of students took a test in Statistics and Probability and the final grades have a mean of 70 and a standard deviation of 10. If we can approximate the distribution of these grades by a normal distribution, what percent of the students; a. scored higher than 80? b. should pass the test (grades≥60)? c. should fail the test (grades<60)?
A large group of students took a test in Statistics and Probability and the final grades have a mean of 70 and a standard deviation of 10. If we can approximate the distribution of these grades by a normal distribution, what percent of the students; a. scored higher than 80? b. should pass the test (grades≥60)? c. should fail the test (grades<60)?
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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A large group of students took a test in Statistics and Probability and the final grades have a mean of 70 and a standard deviation of 10. If we can approximate the distribution of these grades by a
a. scored higher than 80?
b. should pass the test (grades≥60)?
c. should fail the test (grades<60)?
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