Question 443752: Can someone please help me with this?
For the following set of data: 13, 10, 11, 8, 14, 13, 13, 14, 30
1: Find the mean and standard deviatin: I got 14 or the mean and 6.0 for my standard deviation, but I wasn't very confident in that.
2: Within how many standard deviations of the mean do all of the above data values fall?
3: A set of values has a mean of 34 and a standard deviation of 4. Find the z-score of the value 26.
I'm so lost :(
Thank you
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website!
Hi
data: 13, 10, 11, 8, 14, 13, 13, 14, 30
Meam = 14
SD = 6.3246
30 is 2.5298 SD from mean of 14 | (30-14)/6.3246
All fall within that area between the green lines below
34 and a standard deviation of 4: x = 26 then z = -8/4 = -2 
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