It is known that the variance of a population equals 576. A random sample of 144 observations is going to be taken from the population.
a.With a .95 probability, what statement can be made about the size of the margin of error?b.With a .95 probability, how large of a sample would have to be taken to provide a margin of error of 6 or less?
What will be an ideal response?
?
| a. | There is a .95 probability that the sample mean will provide a margin of error of 3.92 or less. |
| b. | 62 |
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