Standard Deviation and Spread

Apply the formula for standard deviation to find the result for the sample data: 7, 9, 11, 13, 15

• 4.5

• 10.2

• 6.8

• 2.236

Use the sample data: 3, 5, 7, 9, 11 to calculate the standard deviation.

• 8.91

• 6.72

• 4.56

• 2.83

Analyze the spread of data with a standard deviation of 6 and a mean of 25.

• The spread of data is within 12 units of the mean of 25.

• The spread of data is within 6 units of the mean of 25.

• The spread of data is within 3 units of the mean of 25.

• The spread of data is within 8 units of the mean of 25.

Apply the formula for standard deviation to find the result for the sample data: 12, 14, 16, 18, 20

• 3.16

• 25

• 7.5

• 10

What is the standard deviation on this Normal Curve?

• 6

• 12

• 34

• 18

The table below shows the area of several states.
Delaware has an area of 2,000 square miles.  Which is true if Delaware is included in the data set?

• The mean increase

• The range decreases

• The interquartile range decreases

• The standard deviation increases

The following symbol represents what?

• the sample mean

• the population mean

• the sample standard deviation

• the population standard deviation

• the sample size

List each set of data by color from the lowest standard deviation to the highest standard deviation.

• blue, green, pink, red

• red, pink, green, blue

• pink, green, red, blue

• blue, green, red, pink

Use the sample data: 4, 6, 8, 10, 12 to calculate the standard deviation.

• 5.67

• 3.45

• 7.91

• 2.83

Interpret the data distribution of a set with a mean of 50 and a standard deviation of 10.

• The data distribution is likely to be bimodal

• The data distribution is likely to be skewed to the right

• The data distribution is likely to be skewed to the left

• The data distribution is likely to be normal with the majority of the data clustered around the mean of 50, and the standard deviation of 10 indicating the spread of the data around the mean.