In need of assistance for homework the chapter is based on c

In need of assistance for homework; the chapter is based on comparing the means of 3 or more independent samples: one-way analysis of variance

Thank you in advance for any aid that can be offered.

1.) In one-way ANOVA, involving three groups, the alternative hypothesis would be considered correct if, in the population,

a. all means were equal

b. two means are equal but the third is different

c. all three means have different values

d. either (b) or (c) above is true

2.) When Null is true for a one-way ANOVA, variation of the group means is a reflection of

a. inherent variation ---

b. differential treatment effects

c. nondifferential treatment effects

d. a combination of (a) and (b)

3.) Variability of subgroup means about the mean of the combined distribution affords an indication of

a. inherent variation

b. variation attributable to treatment, when present

c. a combination of (a) and (b)

d. none of the above

4.) The denominator of any variance estimate consists of

a. within group variation

b. inherent variation

c. degrees of freedom

d. sums of squared deviations

5.) If there are three groups of 10 cases each, then dfwithin =

a. 30

b. 27

c. 29

d. 13

Solution

1. d

2. a

3. d

4. c

5. b