4. It is claimed that the standard deviation for a national placement test is 100. A college professor feels that this i

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4. It is claimed that the standard deviation for a national placement test is 100. A college professor feels that this i

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4 It Is Claimed That The Standard Deviation For A National Placement Test Is 100 A College Professor Feels That This I 1
4 It Is Claimed That The Standard Deviation For A National Placement Test Is 100 A College Professor Feels That This I 1 (28.63 KiB) Viewed 150 times
4. It is claimed that the standard deviation for a national placement test is 100. A college professor feels that this is too low, so he samples 300 scores and finds the sample standard deviation to be 110. Using a = 0.05, is the professor correct?
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