Question Help * Assume that the sample is a simple random sample obtained from a

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Question Help * Assume that the sample is a simple random sample obtained from a normally distributed minimum sample size needed to be 99% confident that the sample standard deviation is within 40% of the population of flight delays at an airport Use the table below to find the standard deviation. A histogram of a sample of those arrival delays suggests that the distribution is skewed, not normal. How does the distributon affect the To be 95% confident that s is within l 1% 5% 10% 20% 30% 40% 50% the value of?, the sample size n |19205768| 192| 48 | 21 | 12 | be at least 40% 1 50% 224 o be 99% confident that s is within 1 % 5% 10% 20% 30% the value of o, the sample size n 33.2181,336 336 85 38 should be at least The minimum sample size needed is A histogram of a sample of those arrival delays sugpests that the distribution is skewed, not normal. How does the distribution A. The oomputed sample size should be divided by 2 O B. The computed minimum sample size is likely corect O C. The computed sample size should be multiplied by 2 D. The computed minimum sample size is not ikely oorrect. Click to select your answer(s).

Explanation / Answer

From the table.

the minimum sample size needed for 99% confident that the sample standard deviation is within 40% of population standard deviation is 22

Option d is correct. The computed minimum sample size is not likely correct.

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