Interpreting a Line (Dot) Plot

What does each x represent?

• hours of exercise

• minutes of exercise

• a person

• days of exercise

How many people exercised 1/4 hour (15 minutes)?

• 3

• 6

• 4

• 5

• 2

How many people did not exercise?

• 3

• 6

• 4

• 5

• 2

How many people exercised for 1/2 hour (30 minutes) or more?

• 3

• 6

• 4

• 11

How many more people exercised 3/4 hour (45 minutes) than 1/2 hour (30 minutes)?

• 4

• 5

• 1

• 2

How many people exercised less than 1/2 hour (30 minutes)?

• 9

• 4

• 6

• 13

How much time did most people exercise? (What is the mode?)

• 0 hours

• 1/4 hour

• 1/2 hour

• 3/4 hour

• 1 hour

What is the midpoint, or median of this data?

(If you rearranged the Xs in a straight line representing the people and their exercise time in sequential order from left to right, where would a line be drawn such that half the people were to the left of the line and half the people were to the right?)

• The median is 0.

• The median is 1/4 hour.

• The median is 1/2 hour.

• The median is 3/4 hour.

• The median is 1 hour.

A line (dot) plot is a type of frequency chart.

• True

• False

This line plot indicates that most people surveyed exercised more than 1/2 hour (30 minutes).

• True

• False