Measures of Center & Box Plots

To find the mean of a set of numbers, you must first list the numbers from smallest to greatest.

• True

• False

Carlos needs to find the median of a set of numbers. He determines that there are two numbers in the middle of his data set. The numbers are 18 and 21. What is the median?

• 18

• 19

• 19.5

• 20

• 21

Wanda writes the numbers in her data set in order from smallest to greatest:

14, 15, 16, 19, 21, 25, 28, 30, 30, 31, 34, 40, 42, 45, 45, 50

What is the median of this set of numbers?

• 14

• 26

• 30

• 36

Here is Wanda's set of numbers again.

14, 15, 16, 19, 21, 25, 28, 30, 30, 31, 34, 40, 42, 45, 45, 50 Which list represents the LOWER half of the data?

• 14, 15, 16, 19, 21, 25, 28

• 14, 15, 16, 19, 21, 25, 28, 30

• 14, 15, 16, 19, 21, 25, 28, 30, 30

• 30, 31, 34, 40, 42, 45, 45, 50

Here is Wanda's set of numbers again:

14, 15, 16, 19, 21, 25, 28, 30, 30, 31, 34, 40, 42, 45, 45, 50

What is Q1 (first quartile) for this data set?

• 14

• 19 or 21

• 20

• 36

Here is Wanda's set of numbers again.

14, 15, 16, 19, 21, 25, 28, 30, 30, 31, 34, 40, 42, 45, 45, 50

What is the range?

• 14

• 50

• 26

• 36

Here is Wanda's set of numbers again:

14, 15, 16, 19, 21, 25, 28, 30, 30, 31, 34, 40, 42, 45, 45, 50

What is the mode?

• There is no mode.

• 36

• 30

• 30 and 45

• 45

Wanda wants to find the mean (average) of her set of numbers. She thinks that mean must be one of the numbers in her set. Is Wanda correct?

• No

• Yes

Here is Wanda's set of numbers again.

14, 15, 16, 19, 21, 25, 28, 30, 30, 31, 34, 40, 42, 45, 45, 50

What is the mean (average) of her numbers? Wanda is going to use a calculator. You can too.

• 30

• 485

• 30.3125

• 32.375

Wally organizes his set of numbers from smallest to largest:

54, 60, 62, 62, 65, 67, 70, 71, 71, 72, 75, 75, 75, 77, 79

What is the median of Wally's set?

• 54

• 79

• 25

• 71

• 75