Answered: Hours Cumulative Percent Frequency per…

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Hours Cumulative Percent Frequency per week Frequency 1-14 36 14.4 15-29 38 30-44 49.6 45-59 63.2 60-75

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter4: Polynomial And Rational Functions

Section4.6: Rational Functions

Problem 11SC: Find the mean hourly cost when the cell phone described above is used for 240 minutes.

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Question

Hours
Cumulative Percent
Frequency
per week
Frequency
1-14
36
14.4
15-29
38
30-44
49.6
45-59
63.2
60-75

Expert Solution

Step 1

We know that

First cumulative percent freqeuncy = Relative frequency of first class = f/n, then

n = frequency of first class/(C.f ÷ 100)

= 36/0.144 = 250

And the last cumulative percent frequency is always 100.

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