Mad and Standard Deviation

Calculate the standard deviation for the following set of numbers: 5, 10, 15, 20, 25

• 7.07

• 4.5

• 8.2

• 12.6

Determine the standard deviation of the numbers: 3, 6, 9, 12, 15

• 5.67

• 3.14

• 7.89

• 4.24

What is the formula to calculate standard deviation?

• Standard Deviation = sqrt(average of (data point - mean)^2)

• Standard Deviation = sum(data point - mean)^2

• Standard Deviation = average of (data point - mean)

• Standard Deviation = sqrt(data point - mean)^2

Find the mean absolute deviation for the numbers: 12, 15, 18, 21, 24

• 2.8

• 3.6

• 4.2

• 5.5

What is the standard deviation on this Normal Curve?

• 6

• 12

• 34

• 18

What does this symbol represent?

• Standard Deviation

• Variance

• mean

• Interquartile Range

When comparing data sets, a higher Standard Deviation indicates...

• More consistency and less variability

• Less consistency and less variability

• More consistency and more variability

• Less consistency and more variability

Which curve has the smallest standard deviation?

• A

• B

• C

Approximately ​ (a)   of the data lies within 2 standard deviations of the mean.​

• 95%

• 50%

• 99.7%

• 68%

Approximately ​ (a)   of the data lies within 1 standard deviation of the mean.​

• 68%

• 50%

• 99.7%

• 95%