'Pooled sample variance' diaporamas de présentation

T-DISTRIBUTION & COMPARISON OF MEANS

T-DISTRIBUTION & COMPARISON OF MEANS. Z as a Test Statistic. Use a Z-statistic only if you know the population standard deviation (?). ?. ? x =. s. s x =. n. n. T as a Test Statistic.

564 views • 37 slides

Lecture 13

Lecture 13. One-Way ANOVA Ch 12. ANOVA=Analysis of Variance. Recall: A categorical variable = factor. Its values =levels ANOVA in general studies the effect of categorical variables on a quantitative variable (response) One-Way = only one factor with several levels

306 views • 30 slides

T-distribution & comparison of means

T-distribution & comparison of means. Z as test statistic. Use a Z-statistic only if you know the population standard deviation ( ? ). Z-statistic converts a sample mean into a z-score from the null distribution. .

280 views • 26 slides

Agenda:

335 views • 22 slides