Question

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. Assume the variable is normally distribution

Answer 1

Please type your <u>subject</u> in the <b>School Subject</b> box. Any other words, <u>including obscure abbreviations</u>, are likely to delay responses from a teacher who knows that subject well.

Answer 2

± 1.645 SEm

Standard Error of the mean = SEm = SD/√(n-1)

That is for a distribution of means.

For a distribution of scores

± 1.645 SD

Answer 3

Given that the distance from the earth to the sun is 1.5 times 10 to the power m and the