A teacher gives a test and notes that the mean is 79 points and the standard deviation is 2 points....

[eddy2017]

when face with a problem like this what is the first thing to do. thanks for any hint. Lost at sea here as to how begin the analysis
thanks,
eddy

 

[eddy2017]

I know this:
I know that standard deviation is 2 points and that means that the data is more clustered together. ther is not much of a spread so off of this I would go with choice B
Most of the test scores are between 77 and 81.

 

[BigBeachBanana]

Why are the other answers wrong?

 

[eddy2017]

Why are the other answers wrong

AThe median test score is equal to 79 points. wrong. the mean is 79 not the median

C. Half of the test scores are greater than 81 points. wrong > otherwise the standard deviation would be greater
D. The lowest test score is 77 and the highest is 81. Wrong then the mean would not be 79