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Construct the corresponding relative frequency

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Reference no: EM131042298

A researcher conducts a mileage economy test involving 82 cars. The frequency distribution describing average miles per gallon (mpg) appears in the following table.

Average mpg

Frequency

15 up to 20

10

20 up to 25

16

25 up to 30

4

30 up to 35

12

35 up to 40

29

40 up to 45

11

a-1. Construct the corresponding relative frequency, cumulative frequency, and cumulative relative frequency distributions.

b-1. How many of the cars got less than 25 mpg?

b-2. What percent of the cars got at least 30 but less than 35 mpg? (Round your answer to 2 decimal place.)

b-3. What percent of the cars got less than 20 mpg? (Round your answer to 2 decimal place.)

b-4. What percent got 20 mpg or more? (Round your answer to 2 decimal place.)

Reference no: EM131042298

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