EXST 2201 : EXST 2201 Test 3 Outline
Document Summary
Dependent sample d = average of the difference between paired individuals. 7. 2 two independent samples: standard deviation, equal: pool standard deviation, not equal; welch"s (n1-1) or (n2-1) Satterwaite: equal population standard deviation, standard divation pooled, standard error of statistic, unequal population standard deviation, independent sample t statistic for unequal standard deviation, welches approximation take smaller number of observation then subtract. 1 to determine the df for t test: satterwaite"s approximation of df. Since we have problems using the t test on 3 or more columns of data we use. Anova uses f distribution to make decision. For class only using one-way anova: one-way anova anova method with only one classification variable, called a factor. Factor a classification variable used to separate data into several columns. Factor will have more than one level. Example age, gender, species: anova hypothesis test one hypothesis test to find whether the 3 population means are equal.
