Frequency of Data

How many students were greater than 55 inches tall but less than 70 inches tall?

• 13

• 15

• 16

• 17

The histogram shows the birth weights of 100 new born babies.  How many babies weighed 8 pounds or more?

• 22

• 23

• 30

• 45

How many people watched more than 6 hours of TV?

• 10

• 5

• 20

• 17

Find the midpoints.

• 25.5, 35.5, 45.5, 55.5, 65.5, 75.5

• 20.5, 30.5, 40.5, 50.5, 60.5, 70.5, 80.5

• 21, 31, 41, 51, 61, 71

• 30, 40, 50, 60, 70, 80

Find the cumulative frequencies.

• 28, 56, 84, 100

• 28, 58, 70, 72, 74, 76

• 33%, 37%, 20%, 7%, 7%, 7%

• 28, 30, 12, 2, 2, 2

A restaurant recorded the number of pizzas sold each month for one year. The data are shown in the graph below. During which month did the restaurant sell 40 pizzas?

• March

• May

• July

• August

Which interval shows the greatest number of pets?

• 15-19

• 0-4

• 5-9

• 10-14

How many people watched more than 25 hours of TV last week?

• 0

• 10

• 38

• 42

Which interval has 4 students?

• 56-59

• 60-63

• 60-67

• 48-51

Which interval has 400 employees?

• 33-43

• 0-10

• 77-87

• 66-76