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if an approxemitly bell shaped distribution has a mean of 30 and standard deviation of 5, what percent of the scores fall between 25 and 35?

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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Question

if an approxemitly bell shaped distribution has a mean of 30 and standard deviation of 5, what percent of the scores fall between 25 and 35?

Expert Solution

Step 1

Given that

X~N( μ = 30 , ? = 5 )

μ = 30 , ? = 5

Formula for Z-score
Z-score =( x - μ )/?

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