# Statistical Sampling Question

Submitted by Nabs on Sun, 06/08/2014 - 11:50

When sampling from a non normal distribution with a known variance, which statistics should be used if the sample size is small and if sample size is large?

a. Large Sample = z-Statistic | small Sample = not available

b. Large sample = z-Statistic | Small Sample = Z-statistics

c. Large sample = t-Statistic | small sample = not available

d. Large sample = z-Statistic | small sample = t-Statistic

can anyone explain the answer of this question and if this kind of questions can come in exam.

i found this one from mock test from my institute.

Thanks.

Forums:

chullan88

Mon, 06/09/2014 - 06:09

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## Is the answer d?

Is the answer d?

Saw it on Yahoo Answers

However Im not able to explain and I personally feel a surface knowledge of these topics would be enough.Expecting experts to comment..

You can remember this easily for the exam.

t comes earlier than z

So t for smaller samples and z for larger samples

Nabs

Mon, 06/09/2014 - 10:40

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## right answer is A- Large

right answer is A- Large Sample=Z-statistic | small sample= not available

i was hoping somebody will say this is irrelevant to PMP exam.Now i have to memorize this as well.