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A distribution has a positive...

A distribution has a positive skew, calculated at +1.0. Estimate the size of the standard error of skewness.

A. >0.5

B. <0.5

C. About 2.0

D. None of the above

An environmental group wants to do a study that would demonstrate with a 99% certainty the the percentage of a certain kind of tree has declined from a known population. The variable under study is the number of this kind of tree acre. They also want to minimize costs by sampling trees from only a few acres. You consult with them before they do the study. WHat is your best advice?

A. They should use the t table for small samples

B. They should use the 99% confidence interval

C. With a small tree sample and a high confidence interval they are not likely to get the results for which they hope.

D. None of the above.

A. >0.5

B. <0.5

C. About 2.0

D. None of the above

An environmental group wants to do a study that would demonstrate with a 99% certainty the the percentage of a certain kind of tree has declined from a known population. The variable under study is the number of this kind of tree acre. They also want to minimize costs by sampling trees from only a few acres. You consult with them before they do the study. WHat is your best advice?

A. They should use the t table for small samples

B. They should use the 99% confidence interval

C. With a small tree sample and a high confidence interval they are not likely to get the results for which they hope.

D. None of the above.

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