1.Sometimes simply looking at the means of groups can give you an idea if group membership. Look at the following mean score and then indicate the strength of the impact group membership has on explaining variation in the dependent variable. Assume small within-group variance and sample sizes of 20, the means are as follows

group 1= 34

group 2= 44

group 3= 7

a)weak

b)moderate

c)strong

2.Sometimes simply looking at the means of groups can give you an idea if group membership. Look at the following mean score and then indicate the strength of the impact group membership has on explaining variation in the dependent variable. Assume small within-group variance and sample sizes of 20, the means are as follows

group 1= 3

group 2= 6

group 3= 34

a.)weak

b)moderate

c)strong

3.If a researcher uses an F-test to compare only two groups and obtains at test statistic of F=6.25, what would the corresponding t-value be?

12.5

42.25

2.5

3.25

4.Sometimes simply looking at the means of groups can give you an idea if group membership. Look at the following mean score and then indicate the strength of the impact group membership has on explaining variation in the dependent variable. Assume small within-group variance and sample sizes of 20, the means are as follows

group 1= 40

group 2= 42

group 3= 41

a)weak

b)moderate

c)strong

5.If a researcher wants to compare three or more groups, what type of statistical analysis should they choose?

z-test

t-test

F-test

correlation