How large a sample size is needed to estimate to within 30 seconds with 95% confidence?
How large a sample size is needed to estimate to within 3 seconds with 95% confidence?
8.1.63
(a) seconds. We can estimate μ, the mean length of time that boys remain engaged with a science exhibit at a museum, to within 38.22 seconds with 95% confidence. (b) 59 (c) 5844 days