# Refer to the following partial anova results from excel (some

Question 1

Refer to the following partial ANOVA results from Excel (some information is missing).

Picture
The number of observations in the entire sample is

20

19

22
1 points
Question 2

Here is an Excel ANOVA table that summarizes the results of an experiment to assess the effects of ambient noise level and plant location on worker productivity. The test used a= 0.05.

Picture
Is the effect of plant location significant at a= .05?

Yes

No

1 points
Question 3

Using one-factor ANOVA with 30 observations we find at a= .05 that we cannot reject the null hypothesis of equal means. We increase the sample size from 30 observations to 60 observations and obtain the same value for the sample F test statistic. Which is correct?

We might now be able to reject the null hypothesis

We surely must reject H0 for 60 observations

C.We cannot reject H0 since we obtained the same F-value

It is impossible to get the same F-value for n = 60 as for n = 30
1 points
Question 4

What are the degrees of freedom for Tukey’s test statistic for a one-factor ANOVA with with n1= 6, n2 = 6, n3 = 6?

3, 6

6, 3

6, 15

3, 15
1 points
Question 5

The Internal Revenue Service wishes to study the time required to process tax returns in three regional centers. A random sample of three tax returns is chosen from each of three centers. The time (in days) required to process each return is recorded as shown below

Picture
The test to use to compare the means would require

Three-factor ANOVA

One-factor ANOVA

Two-factor ANOVA without replication

Two-factor ANOVA with replication
1 points
Question 6

Here is an Excel ANOVA table that summarizes the results of an experiment to assess the effects of ambient noise level and plant location on worker productivity. The test used a= 0.05.

Picture
Is the effect of noise level significant at a= .01?

Yes

No

1 points
Question 7

Refer to the following MegaStat output (some information is missing). The sample size was n = 65 in a one-factor ANOVA.

Picture
At a = .05, which is the critical value of the test statistic for a two-tailed test for a significant difference in means that are to be compared simultaneously? Note: this question requires a Tukey table.

2.81

2.54

2.33

1.96
1 points
Question 8

Refer to the following partial ANOVA results from Excel (some information is missing). The response variable was Y = maximum amount of water pumped from wells (gallons per minute).

Picture
The MS for interaction is

7.25

8.17

8.37

9.28
1 points
Question 9

Refer to the following partial ANOVA results from Excel (some information is missing).
ANOVA Table

Picture
The number of observations in the original sample was

59

60

58

54
1 points
Question 10

To compare the cost of three shipping methods, a random sample of four shipments is taken for each of three firms. The average cost per shipment is shown below.

Picture
In a one-factor ANOVA, degrees of freedom for the within-groups sum of squares will be

11

3

9

2
1 points
Question 11

Which is the Excel function to find the right-tail p-value for Fcalc = 4.52 with n1 = 15, n2 = 12?

=FDIST(4.52, 15, 12)

=FINV(4.52, 14, 11)

=FDIST(4.52, 14, 11)

=FINV(4.52, 15, 12)

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