Assume a data set is normally distributed with mean 10 and standard deviation 3.5. If the data set contains 40 data values, approximately how many of the data values will fall within the range 6.5 to 13.5?
A. 7
B. 38
C. 27
D. 10

Question

Assume a data set is normally distributed with mean 10 and standard deviation 3.5. If the data set contains 40 data values, approximately how many of the data values will fall within the range 6.5 to 13.5?
	A. 7 	
	B. 38 	
	C. 27 	
	D. 10

jim_thompson5910 · Answer

Hint: according to the empirical rule 68% of the distribution is within 1 standard deviation of the mean 95% of the distribution is within 2 standard deviations of the mean 99.7% of the distribution is within 3 standard deviations of the mean http://en.wikipedia.org/wiki/68-95-99.7_rule

anonymous · Answer

Thank you so much :) This is what I get for signing up for the wrong course :(

jim_thompson5910 · Answer

well you may have still some time to drop the course or switch, but idk

personally I recommend sticking with this because it's useful stuff to know that is applied in a lot of fields

anonymous · Answer

I wish I did, I also wish I had found this site 8 weeks ago lol 
If nothing else I can retake it :)

jim_thompson5910 · Answer

that's one positive way to look at it, but hopefully you'll pass the first time

anonymous · Answer

Thank you again :)

jim_thompson5910 · Answer

sure thing