Question

Assume that the sample is a simple random sample obtained from a normally distributed population of flight delays at an airport. Use f of the To he 9546 confident that s is. within table below to find the minimum sample size needed to be 95% confident that the sample standard deviation is within 5 % A histogram of a sample of those arrival delays suggests that the distribution is skewed, not normal. How does the distribution affect the sample size? 5% | 10 % | 20%| 30 % | 40 % | 50 % 1% sample size 205 768 192 48 21 12 n should be at least 6To be 99% confident that s is 10% 20%|30 % | 40 % | 50 % 1% 590 within value of e, the sample size3218 1.336 336 85 38 22 14 should be at least The minimum sample size needed is A histogram of a sample f those arrival delays suggests that the distribution is skewed, not normal. How does the distribution affect the sample size? OA. The computed minimum sample size is likely correct O B. The computed sample size should be multiplied by 2 The computed minimum sample size is not likely correct. O D. The computed sample size should be divided by 2

Answer 1

95%onbideu ce level porulation soudard deuiation 5/. Cantideuce leel = 95 = 0.95 5-/ Nogn ed) half & in the toptable 1n the hsample griven S2e i> row nith 5. The inium Sam ple Si2e needed is The given data nbwaly distrjbuted bt Suggests distributron iske wed nst nama The Computeol runimum sample i not Uky correct So, option (e) ithe Corect one