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Normal probability calculations

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A retailer's sale in widgets is normally distributed over the time of one year. The mean of the sales is 141.1 with a standard deviation of 13.62. What is the probability that he will not be able to sell 160 or more widgets in the next year?

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https://brainmass.com/math/probability/normal-probability-calculations-using-zscore-439224

Solution Summary

This solution provides a step-by-step method for computing test probability based on Z score.

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