If the data represented by the graph is normally distributed, what are the endpoints of the middle 95% of the data?
(A) 4.2 and 11.4
(B) 6 and 9.6
(C) 4.2 and 9.6
(D) 2.4 and 13.2
(E) 6 and 11.4

Question

If the data represented by the graph is normally distributed, what are the endpoints of the middle  95% of the data? 
(A) 4.2 and 11.4
(B) 6 and 9.6
(C) 4.2 and 9.6
(D) 2.4 and 13.2
(E) 6 and 11.4

anonymous · Answer

Graph: http://prntscr.com/7j10xx

anonymous · Answer

@Vocaloid

perl · Answer

You can use the empirical rule

anonymous · Answer

The 85 95 thing?

anonymous · Answer

I have a hard time interpreting the graph

anonymous · Answer

ok so this is the rule i guess 
68% of data falls within the first standard deviation from the mean.
95% fall within two standard deviations.
99.7% fall within three standard deviations.

vocaloid · Answer

hard to explain without giving away the answer, but I'll try

the middle 95% of the data means two standard deviations above and below the mean
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