It is said that sufferers of a cold virus experience symptoms for 7 days. However, the amount
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It is said that sufferers of a cold virus experience symptoms for 7 days. However, the amount of time is actually a normally distributed random variable whose mean is 7.5 days and whose standard deviation is 1.2 days.
a. What proportion of cold sufferers experience fewer than 4 days of symptoms?
b. What proportion of cold sufferers experience symptoms for between 7 and 10 days?
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Related Book For 
Statistics For Management And Economics Abbreviated
ISBN: 9781285869643
10th Edition
Authors: Gerald Keller
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