The number of sit-ups that all tenth-grade girls can do in 5 minutes is normally distributed. Beth surveyed 20 of her fellow intramural tennis players, all tenth-grade girls, and determined the mean number of sit-ups they could do. Can she make an inference about the population mean for all tenth-grade girls based on the sample?

No, because the sample size was not big enough.

No, because she did not use a simple random sample.

Yes, because the sample size was big enough.

Yes, because she used a simple random sample.

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6 April, 10:04

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Nia Elliott · Answer 1

Hello, I think i know the answer

I think the answer is B. No because she did not use a simple random sample.