Asked by tryingtosecurethebag
Question: If a distribution has a mean of 100 and a standard deviation of 15, what value would be +2 standard deviations from the mean?
How would you go about solving this? Find the z-score of 2? I know that 95% (if i'm not mistaken) covers 2 standard deviations.
How would you go about solving this? Find the z-score of 2? I know that 95% (if i'm not mistaken) covers 2 standard deviations.
Answers
Answered by
Ms Pi 3.14159265358979323
If the mean is 100 and the standard deviation is 15, then 2 sd from the mean is 100 + 15 + 15 a mark of ... to the right of the mean and a mark that much to the left of the mean.
The z-score refers to the percent of the data that lies to the left of the mark you are seeking.
The z-score refers to the percent of the data that lies to the left of the mark you are seeking.
Answered by
Reiny
Probably the most useful applet for statistics, just enter
mean=100
sd = 15
2 standard deviations would put you at 130
click either above or below after entering 130
http://davidmlane.com/normal.html
mean=100
sd = 15
2 standard deviations would put you at 130
click either above or below after entering 130
http://davidmlane.com/normal.html
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