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Using 6.84 as a planning value for the population standard deviation. What sample size is required to obtain a margin of error of 1.5 and

Using 6.84 as a planning value for the population standard deviation.

  1. What sample size is required to obtain a margin of error of 1.5 and a level of confidence of 0.95? ___(h)_________

  1. What sample size is required to obtain a margin of error of 2 and a level of confidence of 0.90? _____(a)_______

Please solve using R. Thanks

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