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Normal Probabilities and Confidence Intervals

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I would like to have the attached sample questions completed in excel format, so that I can see the formulas used.

Thanks

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https://brainmass.com/statistics/central-limit-theorem/normal-probabilities-and-confidence-intervals-584618

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Solution Summary

The solution provides step by step method for the calculation of confidence interval and normal probabilities. Attached in Excel.

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