Question

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 deviation s is within 1% of Is this sample size practical? To be 95% confident that s is within of the value of ơ, the sample size n should be at least To be 99% confident that s is within Of the value of ơ, the sample size |33218|1336| 336| 85 | 38 | 22 | n should be at least 190 | 5% | 10% | 20% | 30% | 40% | 50% 9,205 768 192 48 21 12 8 1% | 5% | 10% | 20% | 30% | 40% | 50% 14 The minimum sample size needed is s this sample size practical? O A. No, because the sample size should be as small as possible for most applications. O B. Yes, because the sample size is small enough to be practical for most applications. O C. Yes, because the sample size should be as large as possible for most applications. O D. No, because the sample size is excessively large to be practical for most applications.

Answer 1