1) What percentage of sufferers estimate that their colds lasted for longer than forty-eight hours? (1) What percentage suffered for fewer than 61 hours? (1) What percentage suffered for between one and three days?

MATLAB: An Introduction with Applications
6th Edition
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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An investigator polls a representative sample of common cold sufferers, asking them to estimate the number of hours of physical discomfort caused by their most recent cold. Their estimates approximate a normal curve with a mean of 91 hours and a standard deviation of 23 hours. Show your z-score and p-value calculations.

 

(1) What percentage of sufferers estimate that their colds lasted for longer than forty-eight hours?



(1) What percentage suffered for fewer than 61 hours?



(1) What percentage suffered for between one and three days?

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