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Targeted Hold Time Fractions

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What fraction of the days in April 2005 failed to meet the targeted hold time of 110 seconds? Given the dail average hold time after process improvements was normally distributed with a mean of 79.50 and a standard deviation of 16.86, what fraction of days where the call center failed to meet the targeted hold time of 110 seconds?

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The solution examines targeted hold time fractions.

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X~N(79.50,16.86)
The fraction of the days in April 2005 failed to meet the targeted ...

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