Histograms and Dot Plots

Histograms and Dot Plots

Multiple Choice

How many people at the bowling alley were ages 6 to 25

• 12

• 5

• 7

• 16

Multiple Choice

between what ages were the least amount of people at the bowling alley?

• 6-15

• 16-25

• 26-35

• 36-45

Multiple Choice

How many times did she practice for at least 45 minutes?

• 6

• 7

• 9

• 12

Multiple Choice

How many times did she practice for less than 30 minutes?

• 13

• 9

• 12

• 17

Interpreting Histograms

• ALWAYS look at the labels first!

• Frequencies

• "Bin" widths

• Frequency Density: multiply by bin width

Spread of Histograms

• Range = max - min

• Standard Deviation - COMPLEX formula, but technology can calculate it for us!

• The higher the SD, the greater the spread

Multiple Choice

What is the range of ages shown in this histogram?

• 10 years

• 30 years

• 20 years

• none of the above

Multiple Choice

If Raul measured another tree in the orchard, which is most likely the height of the tree?

• 12 feet
• 21 feet
• 3 feet
• 19 feet

Multiple Choice

How many students have more than 1,000 songs on their MP3 player?

• 5
• 16
• 10
• 4

Dot Plots

A Dot plot is a way to display data along a number line, where each dot represents one number in a set of numbers

Multiple Choice

How many people visited different states?

• 3

• 7

• 6

• 8

The table shows the average lifespans of eight animals.

Let's look at the scale. Why do you think it doesn't start at zero?

Multiple Choice

What is the most common lifespan of the animals?

• 7

• 1

• 10

• 18

Multiple Choice

How many more 9 year-olds participated in the spelling bee than 11 year-olds?

• 5

• 3

• 2

• 1

Multiple Choice

What is the maximum amount of goals scored?

• 3

• 1

• 0

• 7

Multiple Choice

What is the median number of goals scored?

• 3

• 3.5

• 4

• 5

Outlier

An outlier is any number in the data set that is very different from the rest of the numbers.

Multiple Choice

What age is the outlier?

• 13

• 5

• 10

• 9