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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
5 Nov 2021

Given information

Table  constitute of the results of the telephone poll of six hundred adult Americans who were asked about what they think constitutes a middle-class income. The table also, include left endpoint, but not the right endpoint.

 

The results are:

Step-by-step explanation

Step 1.

Frequency of a data point is the number of times the data point occurs in a data set.

Relative frequency is the ratio of frequency of a given class to the sum of frequencies.

Let be the frequency of a class and be the sum of the frequencies.

Then, relative frequency of that class is:

   

 

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