Chapter 12 Flashcards
What is the minimum level of measurement for chi-squared?
Nominal (can do all of them)
What is meant by inferential statistics?
- statistical method used to draw conclusions or make inferences about a larger population based on data collected from a smaller sample of that population, essentially allowing researchers to make predictions or generalizations about a group
What is the meaning for the test of independence?
Look at two categorical variables at a time. Test for associations (how alike they are) between the variables. Determines if the sample distribution in the first variable are different than the categories in the second variable
What is the meaning for the goodness of fit test?
Look at one categorical variable at a time, and it determines if the sample distribution across the categorical variable differs from the hypothesized distribution (theoretically, or based on population values)
What is the alternate hypothesis for the goodness of fit test?
HA: Observations are not equally distributed across categories
What is the null hypothesis for the goodness of fit test?
H0: Observations are equally distributed across categories
What is the null hypothesis for the for the test of independence?
H0: The distribution of observations is independent for the two variables
What is the alternate hypothesis for the test of independence?
HA: The distribution of observations is not independent for the two variables
When should you retain (i.e., fail to reject) the null hypothesis for the chi-squared test based on p-values and alpha values
fail to reject the null hypothesis if the p-value is greater than or equal to alpha
When should you reject the null hypothesis for the chi-squared test based on p-values and alpha values?
reject the null hypothesis if the calculated p-value is less than your chosen alpha level (significance level)
