Chapter 14.1, Problem 7E

(a)

To determine

To find: Theline plot that shows the number of times each zip code is recorded.

Answer to Problem 7E

The line plot for the data set is shown in Figure 1.

Explanation of Solution

Given:

The given data set is,

  $\left\{\begin{array}{l}43221,43212,43026,43220,43214,3026,43229,43229,43220,45414,\\ 43220,43221,43212,43220,43212,43220,43221,43221,43214,43206\end{array}\right\}$

Calculation:

Consider the given data set is,

  $\left\{\begin{array}{l}43221,43212,43026,43220,43214,3026,43229,43229,43220,45414,\\ 43220,43221,43212,43220,43212,43220,43221,43221,43214,43206\end{array}\right\}$

The line plot for the data set is shown in Figure 1.

  

Figure 1

(b)

To determine

To find: The most frequently recorded zip code.

Answer to Problem 7E

The required zip code is 43220.

Explanation of Solution

From the graph shown in Figure 1, the most frequently recorded zip code is 43220.

(c)

To determine

To find: The reason for the store needs such information.

Answer to Problem 7E

The reason for zip collection is to target the audience from a particular zip code area.

Explanation of Solution

The zip code helps in recognizing the place of the customer from where the customer belongs.

Consider that the shop keeps the zip code as the sample to determine the area from which most of the customer are visiting the store so that the audience can be targeted.