Measures of Centre

To find the average of a set of numbers, add up all the items and divide by...

• 2
• The minimum
• The maximum
• The number of items

Find the mean from the data set below.

90, 100, 95, 85, 60, 80

• 85

• 84

• 86

• 90

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

• True
• False

Find the median from the data set below.

12, 5, 9, 18, 22, 25, 5

• 9

• 8

• 12

• 18

James adds all the numbers in a number set, then divides by the quantity of numbers.

What did James find?

• Mean

• Median

• Mode

• Range

Calculate the median for the following set of scores

45, 69, 69, 87, 88, 92, 99, 100

• 87

• 55

• 87.5

• 99

What is the mode in this set of numbers:

7, 14, 20, 3, 7, 14, 2, 14, 7

• 7

• 20

• 7 & 14

• none of the above

Calculate the median for the following data set:

1, 2, 2, 2, 5, 5, 8, 10, 12, 13

• 2

• 6

• 5

• 5.5

Calculate the mean for the following data set:

1, 2, 2, 2, 5, 5, 8, 10, 12, 13

• 2

• 6

• 5

• 5.5

Calculate the mode for the following data set:

1, 2, 2, 2, 5, 5, 8, 10, 12, 13

• 2

• 6

• 5

• 5.5