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Chapter 4: Q. 4.34 (page 173)

Regarding a scatterplot,

a. Identify one of its uses.

b. What property should it have to obtain a regression line for the data?

Short Answer

Expert verified

(a) It is easy to determine the regression slope.

(b) Data should have linear pattern.

Step by step solution

01

Part (a) Step 1: Given information

We need to find the uses of scatterplot

02

Part (a) Step 2: Explanation

The use of scatterplot is,

It is easy to determine whether the regression line is vertically upward, vertically downward, or horizontal, without having to calculate the slope.

03

Part (b) Step 1: Given information

We need to find the property of regression line.

04

Part (b) Step 2: Explanation 

The required property is,

Data should probably have a liner pattern (points lying probably around the line).

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In Exercise 4.9, we give linear equations. For each equation,

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