Chapter B.1, Problem 7E

(a)

To determine

To calculate:

Price occurred with the greatest frequency.

Answer to Problem 7E

Price that has greatest frequency is $3.50$ .

Explanation of Solution

Given information:

Line plot showing a sample of average prices of unleaded regular gasoline in $25$ different cities.

  

Calculation:

The given line plot is:

  

This line plot shows a sample of average prices of unleaded regular gasoline in $25$ different cities.

In order to find out the Price occurred with the greatest frequency.

From the given line plot is verify that the price that has greatest frequency is $3.50$ .

(b)

To determine

To calculate:

Range of price.

Answer to Problem 7E

Range of price is $0.56$ .

Explanation of Solution

Given information:

Line plot showing a sample of average prices of unleaded regular gasoline in $25$ different cities.

  

Calculation:

The given line plot is:

  

This line plot shows a sample of average prices of unleaded regular gasoline in $25$ different cities.

In order to find out the range of price,

We need to subtract smallest data value and greatest data value so it becomes,

  $\begin{array}{l}=3.98-3.42\\ =0.56\end{array}$

Thus range of price is $0.56$ .