Question

Using the Empirical Rule in a normal distribution, what percent of the data falls within three standard deviations of the mean?

50%

68%

95%

99.7%

Answer 1

@whpalmer4 it's 95%

Answer 2

I dont understand if it is saying above or below mean @whpalmer4

Answer 3

Thats why i asked before

Answer 4

68% falls within 1 standard deviation of the mean
95% falls within 2 standard deviations of the mean
99.7% falls within 3 standard deviations of the mean

Answer 5

and then -68% falls within the -1 STD of mean?

Answer 6

to fall within 1 standard deviation of the mean means

mean - std. dev <= x <= mean + std. dev.

Answer 7

2 std deviations:

mean - 2*std. dev <= x <= mean + 2*std. dev.

3 std deviations:

mean - 3*std. dev <= x <= mean + 3*std. dev.

Answer 8

even if you didn't understand what it means to fall within, you should have remembered that I said 99.7% fall within 3 standard deviations.

Answer 9

Sorry, I have leave now, good luck!

Answer 10

yeah i already knew that it's just the wording of the question sorta confused me

Answer 11

alrighty thank you!