Assume that the sample is a simple random sample obtained from a normally distributed population of K) scores of statistics professors. Use the table below to find the minimum sample size needed to be 99% condent that the sample standard deviation 5 is within 40% of o. Is this sample size practical? o . . of the value of mthe sample srze 19205 768 192 48 21 12 a n should be at least (Ratify/o confident that s is 1% 5% 10% 20% of the value of o, the sample size 33,218 1,336 336 n should be at least The minimum sample size needed is D