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Chapter 12: Q. 71 (page 725)

We are interested in whether or not the number of letters in a state name depends upon the year the state entered the Union.

a. Decide which variable should be the independent variable and which should be the dependent variable.

b. Draw a scatter plot of the data.

c. Does it appear from inspection that there is a relationship between the variables? Why or why not?

Short Answer

Expert verified

Part a. Independent variable 鈥� Year the state entered the union

Dependent variable 鈥� number of letters in a state name

Part b.

Part c. It appears to be that there is no relationship between variables.

Step by step solution

01

Part a. Step 1. Given information

Given,

02

Part a. Step 2. Explanation

Year the state entered the union will be the independent variable and number of letters in a state name will be the dependent variable.

03

Part b. Step 1. Explanation

Graph,

04

Part c. Step 1. Explanation

The data are scattered over the plot without any pattern. Therefore it seems there is no relationship between the year entered the union and number of letters in the name according to the inspection.

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