Question
A researcher wishes to estimate the average amount a college student makes over the summer. Assume...
A
researcher wishes to estimate the average amount a college student
makes over the summer. Assume that the standard deviation for the
incomes of all college students during the summer is $400.
1. How large of a sample is necessary so that the margin of
error in a 90% confidence interval is less than $50?
2. How large of a sample is necessary so that the margin of
error in a 95% confidence interval is less than $50?
work and answers for both please and thank you
Homework Answers
Answer #1
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