The California High School Exit Exam scores form a normal distribution with a mean of 750 and a standard deviation of 80.  a sample of 36 students was selected at random. 1)What two sample means will form the boundaries that separate the middle 95 percent of sample means from the rest of the distribution

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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The California High School Exit Exam scores form a normal distribution with a mean of 750 and a standard deviation of 80.  a sample of 36 students was selected at random.

1)What two sample means will form the boundaries that separate the middle 95 percent of sample means from the rest of the distribution?

2) How large a sample is needed to have a standard error that is less than or euqla to 10?

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