Please don't bite my head off if this is in the wrong thread...
How do you get the range for 2 SD and 3 SD? I know the empirical rule. The mean is 80 and the standard deviation is 5.
I actually asked on yahoo answers and someone wrote:
If the mean is µ and the standard deviation is σ then the range for
1 SD is µ-σ to µ+σ,
2 SD is µ - 2σ to µ + 2σ
3 SD is µ - 3σ to µ + 3σ
and you know µ and σ.
What is the 2 and the 3 next to σ?
How do you get the range for 2 SD and 3 SD? I know the empirical rule. The mean is 80 and the standard deviation is 5.
I actually asked on yahoo answers and someone wrote:
If the mean is µ and the standard deviation is σ then the range for
1 SD is µ-σ to µ+σ,
2 SD is µ - 2σ to µ + 2σ
3 SD is µ - 3σ to µ + 3σ
and you know µ and σ.
What is the 2 and the 3 next to σ?
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