1) If the null hypothesis is false because of a sizable treatment effect, the va
ID: 3133388 • Letter: 1
Question
1) If the null hypothesis is false because of a sizable treatment effect, the value of F tends to be
a) considerably smaller than one.
b) smaller than one.
c) larger than one.
d) considerably larger than one.
2) Essentially, the F ratio reflects the ratio of the
a) true null hypothesis to the false null hypothesis.
b) treatment effect to the null hypothesis.
c) observed sample mean differences to the estimated error term.
d) observed sample mean differences to the null hypothesis
3) A treatment effect exists if differences exist between
a) all sample means.
b) all population means.
c) at least one pair of sample means.
d) at least one pair of population means
4) If the observed F equals or exceeds the critical F, the experimental outcome is
a) common, and the null hypothesis is retained.
b) common, and the null hypothesis is rejected.
c) rare, and the null hypothesis is retained.
d) rare, and the null hypothesis is rejected
5) In analysis of variance, variance estimates consist of
a) differences between sample means divided by degrees of freedom.
b) differences between sample means divided by sample size.
c) sum of squares divided by degrees of freedom.
d) sum of squares divided by sample size
6) If the sum of squares for between groups equals 50 and that for within groups equals 70, the sum of squares for total variability must
a) lie between 50 and 70.
b) equal 60.
c) equal 20.
d) equal 120.
7) In an experiment involving four different groups, each consisting of 5 subjects, the degrees of freedom for between groups equals .
a) 3
b) 4
c) 5
d) 20
8) In an experiment involving three different groups, each consisting of 10 subjects, the degrees of freedom for within groups equals .
a) 27
b) 28
c) 29
d) 30
9) In a table that summarizes the results of an analysis of variance, the word "Between" might be replaced by
a) "Within."
b) "Error."
c) “Treatment."
d) "Total."
Explanation / Answer
Answer are below :
1) a) considerably smaller than one.
2) c) observed sample mean differences to the estimated error term.
3) d) at least one pair of population means
4) b) common, and the null hypothesis is rejected.
5) c) sum of squares divided by degrees of freedom.
6) d) equal 120.
7) b) 4
8) a) 27
9) c) “Treatment."
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