Chi-Square

Chi-Square - Chapter 18 The Chi-Square Statistic Parametric...

This preview shows pages 1–7. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 18: The Chi-Square Statistic Parametric and Nonparametric Tests • Chapter 18 introduces two non- parametric hypothesis tests using the chi-square statistic: the chi-square test for goodness of fit and the chi-square test for independence. Parametric and Nonparametric Tests (cont.) • The term "non-parametric" refers to the fact that the chi‑square tests do not require assumptions about population parameters nor do they test hypotheses about population parameters. • Previous examples of hypothesis tests, such as the t tests and analysis of variance, are parametric tests and they do include assumptions about parameters and hypotheses about parameters. Parametric and Nonparametric Tests (cont.) • The most obvious difference between the chi‑square tests and the other hypothesis tests we have considered (t and ANOVA) is the nature of the data. • For chi‑square, the data are frequencies rather than numerical scores. The Chi-Square Test for Goodness-of-Fit • The chi-square test for goodness-of-fit uses frequency data from a sample to test hypotheses about the shape or proportions of a population. • Each individual in the sample is classified into one category on the scale of measurement. • The data, called observed frequencies , simply count how many individuals from the sample are in each category. The Chi-Square Test for Goodness-of-Fit (cont.) • The null hypothesis specifies the proportion of the population that should be in each category....
View Full Document

{[ snackBarMessage ]}

Page1 / 22

Chi-Square - Chapter 18 The Chi-Square Statistic Parametric...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online