I have homework and this is my last question, however I dont understand how to do this pls help :)

In a normal distribution, what percentage of scores will fall between -2 and +2 standard deviations of the mean?
(1 point)
A.
34%
B.
68%
C.
81.5%
D.
95%

Question

I have homework and this is my last question, however I dont understand how to do this pls help :)


In a normal distribution, what percentage of scores will fall between -2 and +2 standard deviations of the mean?
 (1 point)
	A. 	
34%
	B. 	
68%
	C. 	
81.5%
	D. 	
95%

john_es · Answer

Do you know something about the normal distribution?

john_es · Answer

I mean, about the one that gives you in the problem

landshark5 · Answer

Well I original though you find the percent of Zscores the chart covers
is that how you do it? I know how to do standard deviation but not this yet.

landshark5 · Answer

OHhhh I think I got it: The Zscore of 2.0 is .9772 and the Zscore of -2 is .0228. If you subtract you get about .9472~~~ about 95%. Is that correct? I am not sure.

directrix · Answer

See attached chart as study reference.