Mrs. Jones Algebra 2 class scored very well on yesterday’s quiz. With one exception, everyone received an A. Within how many standard deviations from the mean do all the quiz grades fall?

91, 92, 94, 88, 96, 99, 91, 93, 94, 97, 95, 97

Question

Mrs. Jones Algebra 2 class scored very well on yesterday’s quiz. With one exception, everyone received an A. Within how many standard deviations from the mean do all the quiz grades fall? 

91, 92, 94, 88, 96, 99, 91, 93, 94, 97, 95, 97

directrix · Answer

What did you get for the mean and the standard deviation?

anonymous · Answer

huh??

directrix · Answer

>>Within how many standard deviations 

The problem mentions standard deviation. 
You may need to do some studying before we can start to work this problem.

anonymous · Answer

thats what were trying to figure out right ?

directrix · Answer

We need the standard deviation and mean of the list of scores you posted as part of the problem. After we have that information, then we get into this >>how many standard deviations from the mean do all the quiz grades fall?

anonymous · Answer

91, 92, 94, 88, 96, 99, 91, 93, 94, 97, 95, 97 sorry thought i posted it

directrix · Answer

You did post the numbers.

There is an procedure for finding the standard deviation of a set of numbers. 

There is a procedure for finding the average of a set of numbers.

So, first up, we have to find those two values.

Then, we go about trying to figure out the answer to the asked question.