Measures of Central Tendency

Find the mean of the following data set.

15 , 18 , 16 , 20 , 14 , 12 , 8 , 25

(a)  

Find the mean of the following data set:

4.6 , 5.2 , 3.8 , 1.5 , 2.9

(a)  

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

• Add them together and divide by 2
• Write them both as the answer
• Give up
• Pick one

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the mode.

12,10,10,10,13,12,11,13,10

• 10

• 11

• 12

• 13

Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the MEDIAN of Roger's scores?

• 172

• 127

• 193

• 155

Find the median of the data set:
18, 19, 17, 14, 20, 20, 15, 21

• 17
• 18.5
• 20
• 14

A data set can have more than one mode

• True
• False

A data set can have more than one median?

• True
• False

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5
• 6
• 9
• 11

What is the median of the data set?
9, 7, 2, 4, 3, 5, 9, 6, 8, 0, 3, 8

• 6
• 7
• 5.5
• 9