Normal distributions
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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?
Date Average Hold Time (in seconds)
4/1/2005 87
4/2/2005 116
4/3/2005 57
4/4/2005 82
4/5/2005 76
4/6/2005 73
4/7/2005 56
4/8/2005 92
4/9/2005 76
4/10/2005 55
4/11/2005 83
4/12/2005 107
4/13/2005 87
4/14/2005 63
4/15/2005 87
4/16/2005 83
4/17/2005 99
4/18/2005 73
4/19/2005 102
4/20/2005 62
4/21/2005 83
4/22/2005 82
4/23/2005 103
4/24/2005 48
4/25/2005 72
4/26/2005 73
4/27/2005 62
4/28/2005 96
4/29/2005 63
4/30/2005 87
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Solution Summary
This solution finds the proportion of hold times meeting a given criterion and calculates a probability based on a normal distribution
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