27.10.2014 Views

Russel-Research-Method-in-Anthropology

Russel-Research-Method-in-Anthropology

Russel-Research-Method-in-Anthropology

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Bivariate Analysis: Test<strong>in</strong>g Relations 625<br />

7<br />

6<br />

Chad<br />

5<br />

Ghana<br />

Namibia<br />

TFR (y)<br />

4<br />

El Salvador<br />

y = 3.114<br />

3<br />

Iran<br />

Panama<br />

Sur<strong>in</strong>ame<br />

2<br />

Armenia<br />

Slovenia<br />

Latvia<br />

1<br />

0 20 40 60 80 100 120<br />

INFMORT (x)<br />

Figure 20.4. A plot of the data <strong>in</strong> table 20.14. The dotted l<strong>in</strong>e is the mean of TFR.<br />

The solid l<strong>in</strong>e is drawn from the regression equation y 1.018 .051x.<br />

Regression<br />

The formula for the regression l<strong>in</strong>e is<br />

y a bx Formula 20.19<br />

where y is the variable value of the dependent variable, a and b are some constants<br />

(which you’ll learn how to derive <strong>in</strong> a moment), and x is the variable<br />

value of the <strong>in</strong>dependent variable. The constant, a, is computed as:<br />

a y bx Formula 20.20<br />

and b is computed as<br />

b <br />

nxyxy<br />

2x<br />

2<br />

Formula 20.21<br />

nx

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!