Question: A statistics professor finds that the time (in second) to improve her quiz has a mean of 180 seconds and a standard deviation of 30

A statistics professor finds that the time (in second) to improve her quiz has a mean of 180 seconds and a standard deviation of 30 seconds. Is a time of 90 seconds unusual? Why or why not

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A statistics professor finds that the time (in second) to improve her quiz has a mean of 180 seconds and a standard deviation of 30 seconds. Is a time of 90 seconds unusual? Why or why not

A statistics professor finds that the time (in seconds) required to complete a quiz has a mean of 180 seconds and a standard deviation of 30 seconds. Is a time of 90 seconds unusual? Why or why not?

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