Variability & Graphs

IQR stands for...

• interquestion rainbow

• inside quick radiation

• interquartile range

• I quit running

Used to indicate the spread of set of data

• Measures of Central Tendency

• Measures of Variability

• Measures of Center

What is the range of the given scores: 7, 23, 16, 15, 18, 9

• 16

• 12

• 15

More people had between __ and __ cups of coffee than any other range.

• 0-3
• 8-11
• 12-15
• 16-19

How many students are between 48 and 51 inches tall?

• 14
• 8
• 2
• 0

How many people watched between 6 and 10 hours of TV last week?

• 31
• 22
• 15
• 35

Is a histogram the same as a bar graph?

• Yes, because they both use intervals.
• No, because a histogram displays numerical data while a bar graph displays categorical data.
• Yes, because they both use bars to display data.
• No, because a histogram displays categorical data while a bar graph displays numerical data.

How many cities have temperatures between 70 degrees and 99 degrees?

• 44
• 34
• 26
• 62

What is an interval?

• A single number
• A range of numbers
• A percentage
• A total amount

Find the IQR (Q3 - Q1) of the data

20, 22, 25, 29, 31

• 30

• 25

• 21

• 9