Find the 90% confidence interval for the variance and the standard deviation of the ages of seniors at Oak Park College if a sample of 24 students has a standard deviation of 2,3 years
Homework Answers
Standard Error of the mean = SEm = SD/√(n-1)
That is for a distribution of means.
For a distribution of scores
± 1.645 SD
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Find the 90% confidence interval for the variance and the standard deviation of the ages of seniors at Oak Park College if a sample of 24 students has a standard deviation of 2,3 years
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