Centers and Variation

What is the standard deviation for the data given:
{12, 13, 29, 18, 61, 35, 21}

• 293.67

• 15.87

• 17.14

• 41.98

What is the standard deviation for the data given:

• 6.89

• 10.1

• 7.26

• 9

If the standard deviation of a data set is 4, what is the variance?

• 2

• 16

• 4

Given a variance of 64, what is the standard deviation?

• 8

• 4096

• 0

• 6.8

Which of the following is a measure of variability?

• mean

• median

• mode

• standard deviation

Which data set would result in more variability? Explain you answer.

Set A: How tall each girl is in 2nd period.

Set B: How tall each girl and boy is in 2nd period.

• Set A

• Set B

• Not enough information

Which data set shows more variability? Explain your answer.

• Female

• Male

• Not enough information

Once you've calculated the mean, and listed the values in a table, what is the next step to calculating the variance?

• Square each value in the data set

• Subtract each value in the data set from the mean

• Subtract the mean from each value in the data set

• Add the mean to each value in the data set

Order the dot plots from least to greatest standard deviation.

• A, D, C, B

• B, C, D, A

• A, D, B, C

• B, C, A, D

An Outlier Is…

• A value that is in the middle of a data set.

• A value very close to the mean of the data set.

• A value that is an abnormal distance from other points in the data set.

• A number that makes more sense to use in the context of a data set.