A researcher conducts a mileage economy test involving 105 cars. The frequency distribution describing average miles per gallon (mpg) appears in the following table. Average mpg 15 ≤ x < 20 Frequency 8 20 ≤ x < 25 25 x 30 28 15 30 x 35 35 ≤ x < 40 40 ≤ x < 45 9 27 18 a-1. Construct the relative frequency distribution. Note: Round "Relative Frequency" to 4 decimal places. Average mpg Relative Frequency 15 ≤x≤20 20 ≤ x < 25 25 ≤ x < 30 30 ≤ x < 35 35 ≤ x <40 40 ≤ x < 45 a-2. What proportion of the cars got at least 40 mpg but less than 45 mpg? Note: Round your answer to 4 decimal places. Proportion of cars a-3. What proportion of the cars got less than 35 mpg? Note: Round your answer to 4 decimal places. Proportion of cars a-4. What proportion of the cars got 35 mpg or more? Note: Round your answer to 4 decimal places. Proportion of cars

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A researcher conducts a mileage economy test involving 105 cars. The frequency distribution describing average miles per gallon
(mpg) appears in the following table.
Average mpg Frequency
15 x 20
8
20 ≤ x < 25
28
25 x
30
15
30
x
35
9
35
x
40
40 x
45
27
18
a-1. Construct the relative frequency distribution.
Note: Round "Relative Frequency" to 4 decimal places.
Average mpg
Relative
Frequency
15 ≤ x < 20
20 ≤ x < 25
25 ≤ x < 30
30 ≤ x < 35
35 ≤ x < 40
40 ≤ x < 45
a-2. What proportion of the cars got at least 40 mpg but less than 45 mpg?
Note: Round your answer to 4 decimal places.
Proportion of cars
a-3. What proportion of the cars got less than 35 mpg?
Note: Round your answer to 4 decimal places.
Proportion of cars
a-4. What proportion of the cars got 35 mpg or more?
Note: Round your answer to 4 decimal places.
Proportion of cars
Transcribed Image Text:A researcher conducts a mileage economy test involving 105 cars. The frequency distribution describing average miles per gallon (mpg) appears in the following table. Average mpg Frequency 15 x 20 8 20 ≤ x < 25 28 25 x 30 15 30 x 35 9 35 x 40 40 x 45 27 18 a-1. Construct the relative frequency distribution. Note: Round "Relative Frequency" to 4 decimal places. Average mpg Relative Frequency 15 ≤ x < 20 20 ≤ x < 25 25 ≤ x < 30 30 ≤ x < 35 35 ≤ x < 40 40 ≤ x < 45 a-2. What proportion of the cars got at least 40 mpg but less than 45 mpg? Note: Round your answer to 4 decimal places. Proportion of cars a-3. What proportion of the cars got less than 35 mpg? Note: Round your answer to 4 decimal places. Proportion of cars a-4. What proportion of the cars got 35 mpg or more? Note: Round your answer to 4 decimal places. Proportion of cars
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