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A researcher reported that the 95% confidence interval for the mean ranged from 460 to 540....

A researcher reported that the 95% confidence interval for the mean ranged from 460 to 540. He knew that the population is normally distributed. He was sure that the mean of the sample was 500, the standard deviation of the sample was 160, but he could not remember the exact sample size. Can we help him out finding the sample size?

Select one:

A. 8

B. 62

C. 16

D. 44

Math   Statistics-And-Probability   
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thank you.

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