Mat 143 Statistics Empirical Rule

What percent of people are 2 standard deviations or more above the mean?

• 2.35

• 34

• 68

• 2.5

If the shaded area under the curve is .85, what is the other missing portion of the curve?

• .26

• .15

• .30

• .17

Which interval shows 68% of the data given a mean of 15 and a standard deviation of 3? 

• 9 to 21

• 12 to 18

• 6 to 24

• 13 to 16

Which interval shows 99.7% of the data given a mean of 15 and a standard deviation of 3?

• 9 to 21

• 12 to 18

• 6 to 24

• 13 to 16

What percentage of data is 1 standard deviation away

• 68%

• 95%

• 99.7%

• 34%

What percentage of data is within 3 standard deviations

• 99.5%

• 68%

• 45%

• 99.7%

What percentage of data is within 2 standard deviations

• 68

• 95

• 99.7

• 2.35

What percentage of the data is between 0 and -1 standard deviations

• 34%

• 50%

• 2.35%

• 13.5%

What percentage of the data is between -2 and -3 standard deviations

• 34%

• .15%

• 2.35%

• 13.5%

What percentage of the data is greater than 3 standard deviations

• 34%

• .15%

• 2.35%

• 13.5%