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What is the Sample Size given standard deviation is 7.22, error is within 2.17, and confidence level is 0.8? (Please round your answer to 2

What is the Sample Size given standard deviation is 7.22, error is within 2.17, and confidence level is 0.8?

(Please round your answer to 2 decimal places)

Hi, could you please answer this question?

I would greatly appreciate a fast response.

Thank you very much!

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