Data Analysis

What is the purpose of a title in a graph?

• • To tell what the graph is about

• • To make it look nice

• • To add more colors

What is the relationship between tally marks and a frequency table?

What do you learn from a bar graph?

• • Only the colors of the bars

• • The number of times each category occurs

• • How to draw

Why do we use graphs to show data?

• • To confuse people

• • To organize and understand data easily

• • To make it look pretty

How can we tell if different graphs show the same data?

• By guessing

• By looking at the colors

• By comparing the counts or frequencies

Which representation is easier to understand?

• A frequency table

• A pictograph

• It depends on the person

Which interval shows the greatest number of pets?

• 15-19

• 0-4

• 5-9

• 10-14

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

• 85

• 84

• 86

• 90

Find the range.
5, 15, 10, 20, 15, 10, 15

• 5

• 10

• 15

• 13

Find the mode.
5, 15, 10, 20, 15, 10, 15

• 10

• 15

• 20

• 5