Spread Data

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

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

• 5.67

• 3.45

• 7.91

• 2.83

Analyze the spread of data with a standard deviation of 8 and a mean of 40.

• Most of the data points are within 16 units of the mean.

• The data is evenly distributed around the mean.

• The standard deviation is not relevant in this case.

• Most of the data points are within 8 units of the mean.

Calculate the mean of the following sample data: 5, 8, 12, 15, 20

• 12

• 18

• 10

• 25

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.

What is the spread of the data?

• 100

• 110

• 50

• 150

What is the spread of the test scores?

• 12%

• 10%

• 13%

• 27%

What shape is the data shown in the dot plot?

• symmetrical

• skewed left

• skewed right