Quiz

A researcher conducted a survey to see how long it takes people to learn how to use a new computer application.  The mean time was 75 minutes and the standard deviation was ten minutes.  If the distribution is normal, then it should fit the table below.

Range Below 65 Minutes From 65 to 75 Minutes From 75 to 85 Minutes Above 85
Minutes
Percent 16% 34% 34% 16%

The table below shows counts of the actual times from participants in the survey

Range Below 65 Minutes From 65 to 75 Minutes From 75 to 85 Minutes Above 85
Minutes
Count 40 60 70 50

 

Can it be concluded that the learning time follows a normal distribution?  Conduct the appropriate test to find out.