Question

Question Help Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 99% confident that the sample standard deviations is within 40% of o. Is this sample size practical? To be 95% confident that s is within 1% 5% 10% 20% 30% 40% 50% of the value of the sample size 19,205 768 192 n should be at least 48 21 128 To be 99% confident that s is within 1% 5% 10% 20% 30% 40% 50% of the value of o, the sample size h should be at least 33,218 1,336 336 85 38 14 22 The minimum sample size needed is I

Answer 1

From mentioned table

For to be 99% confident that S within 40% of the $\sigma$ .

The sample size n should be atleast 22

Answer is 22

It is small enough to be practical for most applications