A. To use a normal approximation to the binomial, which of the following must be

Question

A. To use a normal approximation to the binomial, which of the following must be true?

np 10, n(1 - p) 10 (some textbooks say np 5, n(1 - p) 5).

Each trial must be independent.

If you're sampling, the population size must be at least 20 times as large as the sample size. (Some textbooks say ten times as large.)

None of the above

All of the above

B. You create a distribution for a statistic from all possible samples of the same size drawn from a large population. What's true of this distribution?

It has the same variance as the parent population.

It's called the sampling distribution of the statistic.

It always has a mean greater than the population mean.

It gives us the probability of getting different values for the population parameter.

None of the above are true

Explanation / Answer

A) a normal approximation to the binomial,

B) It's called the sampling distribution of the statistic.

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