When comparing the means of three groups and above in population, we use
A: t-test
B: ANOVA
C: Chi-square
D: Rank test
A: t-test
B: ANOVA
C: Chi-square
D: Rank test
举一反三
- in comparing the means of two independent population , sample are randomly selected from normally distributed populations and population variances are equal, we can use paired t test for the mean difference.
- Analysis of variance (ANOVA) models test hypotheses about the population variance.
- An analyst does research about hypothesis testing. Which of the following test statistics is most appropriate test statistics for two means based on samples that we believe are dependent A: T-test. B: F-test. C: Chi-square test.
- Analysis of Variance (ANOVA) is a test for the difference in . A: means of two or more samples B: means of three or more samples C: vairance of three or more smaples D: means of two or more populations E: variance of two or more populations
- When we test instrument relevance in practice, we can A: use the residual from the 2nd stage of the 2SLS B: use the residual from the true model C: apply significance test on the 1st stage of the 2SLS D: none of the above.