1.
What distribution
does the F distribution approach as the sample size increases?

A:
Binomial
B:
Normal
C:
Poisson
D:
Exponential

2.
A large department
store examined a sample of the 18 credit card sales and recorded the amounts
charged for each of three types of credit cards: MasterCard, Visa and
Discover. Six MasterCard sales, seven Visa and five Discover sales were
recorded. The store used ANOVA to test if the mean sales for each credit
card were equal. What are the degrees of freedom for the F
statistic?

A:
18 in the
numerator, 3 in the denominator
B:
3 in the
numerator, 18 in the denominator
C:
2 in the
numerator, 15 in the denominator
D:
6 in the
numerator, 15 in the denominator

3.
In ANOVA, an F
statistic is used to test a null hypothesis such as:

A:
H_{o}:
s^{2}_{1}
= s^{2}_{2}=
s^{2}_{3
}
B:
H_{o}:
s^{2}_{1}
¹
s^{2}_{2}¹
s^{2}_{3
}
C:
H_{o}:
m_{1}
= m_{2}=
m_{3
}
D:
H_{o}:
m_{1}
¹
m_{2}¹
m_{2
}

4.
If an ANOVA test
is conducted and the null hypothesis is rejected, what does this indicate?

A:
Too many
degrees of freedom
B:
No difference
between the population means
C:
A difference
between at least one pair of population means
D:
None of the
above

5.
A preliminary
study of hourly wages paid to unskilled employees in three metropolitan
areas was conducted. Seven employees were included from Area A, 9 from Area
B and 12 from Area C. The test statistic was computed to be 4.91. What can
we conclude at the 0.05 level?

A:
Mean hourly
wages of unskilled employees all areas are equal
B:
Mean hourly
wages in at least 2 metropolitan areas are different
C:
More degrees
of freedom are needed
D:
None of these
is correct

6.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What is the
sum of squares for the treatment?

A:
67.80
B:
58.07
C:
149.34
D:
23.47

7.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What is the
sum of squares of the error?

A:
67.80
B:
58.07
C:
149.34
D:
23.47

8.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What is the
critical value of F at the 5% level of significance?

A:
19.45
B:
3.00
C:
3.35
D:
3.39

9.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What is the
critical value of F at the 1% level of significance?

A:
99.46
B:
5.49
C:
5.39
D:
4.61

10.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What are
the degrees of freedom for the treatment sum of squares?

A:
2
B:
3
C:
10
D:
27

11.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What are
the degrees of freedom for the error sum of squares?

A:
3
B:
10
C:
27
D:
30

12.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What are
the total degrees of freedom?

A:
27
B:
28
C:
29
D:
30

13.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What is the
mean square for treatments?

A:
2.511
B:
2.151
C:
33.9
D:
29.035

14.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What is the
mean square for error?

A:
2.511
B:
2.151
C:
33.9
D:
29.035

15.
A manufacturer of automobile transmissions uses three different processes.
The management ordered a study of the production costs to see if there is a
difference among the three processes. A summary of the findings is shown
below.
What is the
calculated F?

A:
0.086
B:
1.168
C:
11.56
D:
13.50
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