Measure of Center

Measure of Center

Mean

• Average number of the data set

• Add up all the numbers and divide by how many you have

Multiple Choice

What is the definition of the mean?

• The average

• The middle number

• The difference between the highest and lowest number

• The number that occurs the most

Multiple Choice

What is another word for AVERAGE?

• Mode

• Median

• Mean

• Range

Multiple Choice

What number would you DIVIDE by to calculate the mean of 3, 4, 5 and 6?

• 6

• 3

• 4

• 5

Fill in the Blanks

What is the mean of this set of data? {12,14,15,20,20,30,40,49}

Multiple Choice

On the semester final, Joe scored 85, Jill scored 89, and Bill scored a 99. What was the average score for these students? _________

• 85

• 273

• 91

Median

• The MIDDLE number of an ordered set of data.

• If there are two numbers in the middle, you ADD them and DIVIDE by 2.

Multiple Choice

What is the median of the set of data? {14, 12, 20, 25, 25, 35,48,46}

• 25

• 20

• 14

• 48

Multiple Choice

In order to find the median, the data must be sorted from least to greatest first.

• True

• False

Multiple Choice

When finding the median, what do you do if there are two middle numbers?

• Write them both as the answer

• Add them together and divide by 2

• Pick one

Multiple Choice

The number of miles that Sammie cycled each week for a 7-week period is shown:

36, 42, 28, 52, 48, 36, 31

What is the median number of miles Sammie cycled?

• 24

• 39

• 36

• 52

Mode

• The number that shows up the MOST.

• You can have more than one mode & you can have no mode.

Multiple Choice

What is the mode of the set of data? {12, 14, 15, 20, 20, 30, 40, 50}

• 40

• 30

• 20

• 12

Multiple Choice

The mode score on the 7th grade math test was 94! Which of these interpretations must be correct?

• No student made a 94

• 94 was the lowest score

• More students scored a 94 on the test.

• 94 was the average score

Multiple Choice

What is the mode?

• # happening the most

• Highest # - Lowest #

• the average

• the middle number

Multiple Choice

What is the mode? {5, 5, 4, 3, 3, 3, 5, 23, 4, 20}

• 5

• 3

• 5 & 3

• 20

Range

• Highest # - Lowest # =

• Figure out the highest # in the set and the lowest # in the set and SUBTRACT.

Multiple Choice

What is the range of the data set? {60, 70, 90, 120, 25, 4, 100, 34}

• 100

• 116

• 96

• 80

Multiple Choice

Lizzy had test scores of: 72, 94, 108, 60

What is the RANGE of her test scores?

• 108

• 94

• 48

• 72

Multiple Choice

What is the range?

• The sum of the largest and smallest number

• The number in the middle

• The difference between the largest and smallest number

• The number that appears the most

Multiple Choice

What is the range?

8, 10, 60, 3, 5, 13, 12, 40, 8

• 10

• 57

• 40

• 13