Assume that the sample is a simple random sample obtained from a normally distributed population of flight delays at an airport. Use the table below to find the minimum sample size needed to be 95 ​% confident that the sample standard deviation is within 10 % of the population standard deviation. 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? Assume that the sample is a simple random sample obtained from a normally distributed population of flight delays at an airport. Use the table below to find the minimum sample size needed to be 95
​%
confident that the sample standard deviation is within
10 %
of the population standard deviation. 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?
sigma
To be​ 95% confident that s is within 1% ​5% ​10% ​20% ​30% ​40% ​50%
of the value of
sigma
​,
the sample size n should be at least ​19,205 768 192 48 21 12 8
To be​ 99% confident that s is within ​1% ​5% ​10% ​20% ​30% ​40% ​50%
of the value of
sigma
​,
the sample size n should be at least 33,218 1,336 336 85 38 22 14
The minimum sample size needed is nothing
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?
A. The computed minimum sample size is not likely correct.
B. The computed minimum sample size is likely correct.
C. The computed sample size should be multiplied by 2.
D. The computed sample size should be divided by 2.