Calculating Cumulative Frequency

Calculating Cumulative Frequency

Lesson Objectives;

• ​explain the meaning of cumulative frequency

• ​calculate cumulative frequency from a frequency table

• ​draw a cumulative frequency curve from a cumulative frequency table.

​Meaning and how to calculate cumulative frequency

​Watch the video on the next slide, make some notes and respond to the proceeding quiz.

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Multiple Choice

How many scores were 26 or below?

• 10

• 20

• 5

• 25

Multiple Choice

What is the first number in the cumulative frequency column?

• 12

• 30

• 8

• 20

Multiple Choice

What is the missing number in the cumulative frequency column?

• 19

• 9

• 15

• 22

Multiple Choice

What is the missing number?

• 4

• 5

• 20

• 36

Multiple Choice

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

Multiple Choice

A clumsy teacher spilled coffee over this table of his students' test results. How many students scored below 17?

• 4

• 23

• 18

• 19

​Drawing a cumulative frequency Curve

​Watch the video on the next slide, make some notes and respond to the proceeding quiz.

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Multiple Choice

Which of these could be a cumulative frequency graph?

Multiple Choice

How many students scored 40% or below on the test?

• 21

• 22

• 20

• 15

Multiple Choice

The graph shows the masses of some pumpkins grown on an allotment. How many pumpkins were grown altogether?

• 30

• 27

• 28

Multiple Choice

Find the number of passengers who waited for the bus for 15 min or less.

• 6

• 10

• 20

• 24

Multiple Choice

Find the number of patients who waited for more than 80 min for a doctor.

• 12

• 16

• 62

• 64

Multiple Choice

What percent of the college students surveyed have less than $5000 in debt?

• 25%

• 50%

• 70%

• 100%

Multiple Choice

When drawing a cumulative frequency graph, we should join the points with...

• ... a curve

• ... straight lines

Multiple Choice

Cumulative frequency always goes on the...

• y axis

• x axis

Multiple Choice

"Cumulative frequency" means...

• Jogging sum

• Walking difference

• Running total of the frequency

• Sprinting maximum

​The End