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Data Session 3, Part C: Relative and Cumulative Frequencies and Leaf Plot
 
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Session 3, Part C:
Relative and Cumulative Frequencies

In This Part: Relative Frequencies | Cumulative Frequencies
Relative Cumulative Frequencies

You can convert cumulative frequencies to relative cumulative frequencies by dividing each cumulative frequency by the total number of data values. For the 52 estimates of a minute, here are the relative cumulative frequencies:

Interval

Cumulative Frequency

Relative Cumulative Frequency

Fraction

Decimal

%

30 to < 40

4

4/52

.077

7.7

40 to < 50

5

5/52

.096

9.6

50 to < 60

22

22/52

.423

42.3

60 to < 70

40

40/52

.769

76.9

70 to < 80

47

47/52

.904

90.4

80 to < 90

51

51/52

.981

98.1

90 to < 100

52

52/52

1.000

100.0

Problem C5

Solution  

Use only the relative cumulative frequencies from this table to answer the questions below. This time, give your answers in percentages, to the nearest tenth of a percent.

a. 

What percentage of the responses are in the 70s and below?

b. 

What percentage of the responses are 80 or higher?

c. 

What percentage of the responses are in the 50s and below?

d. 

What percentage of the responses are 60 or higher?

e. 

What percentage of the responses are less than 100?

f. 

What percentage of the responses are at least 40 but below 70?


Next > Part D: Ordering Hats

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