A test was given to 120 students, and the scores 8 approximated a normal distribution. If the mean score was 72 with a standard deviation of 7, approximately what percent of the scores were 65 or higher? A 50% B 68% C 76% D 84%

A test was given to 120 students, and the scores 8 approximated a normal distribution. If the mean score was 72 with a standard deviation of 7, approximately what percent of the scores were 65 or higher? A 50% B 68% C 76% D 84%

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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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

A test was given to 120 students, and the scores
approximated a normal distribution. If the mean score was
72 with a standard deviation of 7, approximately what
percent of the scores were 65 or higher?
50%
B 68%
C 76%
D 84%
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