23. value:

10.00 points

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.	Construct the corresponding relative frequency, cumulative frequency, and cumulative relative frequency distributions.(Round"relative frequency"and"cumulativerelative frequency"to 4 decimal places.)

Average mpg	Relative Frequency	Cumulative Frequency	Cumulative Relative Frequency
15 up to 20
20 up to 25
25 up to 30
30 up to 35
35 up to 40
40 up to 45
Total

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

Number of cars

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

Percentage of cars

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

Percentage of cars

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

Percentage of cars