Measure of variation

Calculate the range of the following

2, 5, 8, 3, 13, 5

• 11
• 13
• 5
• 8

calculate the median for the following set of scores

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

• 87
• 55
• 87.5
• 99

Calculate the interquartile range of the following data

17, 18, 18, 19, 20, 21, 21, 23, 25

• 3
• 4
• 5

  
  

• 8

  
  

Find the mean.
90, 100, 95, 85, 60, 80

• 85
• 84
• 86
• 90

Find the median.
12, 5, 9, 18, 22, 25, 5

• 9
• 8
• 12
• 18

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

Find the interquartile range using the following data.
18, 15, 22, 16, 17, 15, 12, 22, 13

• 34
• 16
• 6
• 10

True or False
To find the IQR (interquartile range) you have to add the Q3 + Q1.

• True
• False

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

What is the mode?

• Number that occurs the most

• The Average

• The difference between the highest and lowest values

• The Number in the middle