Problem to start class on Sept. 9th :  #15 on page 413 Suppose there is a normally distributed population with a mean of 100 and a standard deviation of 10.  If x bar is the average of a sample of 50, find the following probabilities. a. P(x bar <=110)    b. P(x bar>=90)   c. P(95<= x bar <= 115)   d.  P(85<= x bar <= 98)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.5: Comparing Sets Of Data
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Problem to start class on Sept. 9th :  #15 on page 413
Suppose there is a normally distributed population with a mean of 100 and a standard deviation of 10.  If x bar is the average of a sample of 50, find the following probabilities.

a. P(x bar <=110)    b. P(x bar>=90)   c. P(95<= x bar <= 115)   d.  P(85<= x bar <= 98)

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