WHAT IS THIS QUESTION ASKING FOR?? the marks obtained by students of a class in a test are normally distributed with a mean of 60 marks and a standard deviation of 5 marks. about what percent of students have scored between 60 and 65 marks?
a. 13.5
b. 34
c. 50
d. 95

Question

anonymous · Answer

For a normal distribution there are simple approximations for what fraction of the values lie between the mean and 1 or 2 or 3 std dev.

anonymous · Answer

http://rchsbowman.wordpress.com/2009/11/29/statistics-notes- –-properties-of-normal-distribution-2/

anonymous · Answer

attachment

anonymous · Answer

is there a formula that i use?

anonymous · Answer

The question asks, what fraction lies between mu and 1 sd above mu.

anonymous · Answer

okay..thanks for your help!

anonymous · Answer

answer in simple words without using that much technical jargon is 13.5

anonymous · Answer

"jargon" is in the figure