standard deviation always gets me...
If a certain sample of data has a mean of 20.0 and a standard deviation of 3.0, which of the following values is more than 2.5 standard deviations from the mean?
a) 12.0
b) 13.5
c) 17.0
d) 23.5
e) 26.5
the answer: A
I have no idea what the question is asking..
source: OG
Thank you in advance..
standard deviation
This topic has expert replies
Hey gte793n
Standard Deviation is really a simple concept
Think of the mean as the centre. SD is the distance from the mean.
Stastically it just denotes the normal deviation or the variation of the values from the mean or the centre value.
Hope this helps!!!
Standard Deviation is really a simple concept
Think of the mean as the centre. SD is the distance from the mean.
Stastically it just denotes the normal deviation or the variation of the values from the mean or the centre value.
Hope this helps!!!