Normal Distribution! HELP!!!

.A data distribution has a mean of 110 and a standard deviation of 5. According to the Empirical Rule the range of data values that define the middle 95% of data is which of the following?

You may refer to Figure 6.4.5 from your text (The Normal Curve and the Empirical Rule), but this figure is not given on your test.



A) 80 - 140
B) 85 - 135
C) 90 - 130
D) 95 - 125
E) 100 - 120
F) 105 - 115

ckpridham said:

.A data distribution has a mean of 110 and a standard deviation of 5. According to the Empirical Rule the range of data values that define the middle 95% of data is which of the following?

You may refer to Figure 6.4.5 from your text (The Normal Curve and the Empirical Rule), but this figure is not given on your test.



A) 80 - 140
B) 85 - 135
C) 90 - 130
D) 95 - 125
E) 100 - 120
F) 105 - 115

Click to expand...

Looks like you are weak on the very basics of normal distributions. Have you learned how many standard deviations +/- from the mean account for 95% of the data? OR for that matter, 68% or 99.7%?