# 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 isAnswer
20
19
221 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?Answer
Yes
No
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?Answer
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 = 301 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?Answer
3, 6
6, 3
6, 15
3, 151 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 requireAnswer
Three-factor ANOVA
One-factor ANOVA
Two-factor ANOVA without replication
Two-factor ANOVA with replication1 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?Answer
Yes
No
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.Answer
2.81
2.54
2.33
1.961 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 isAnswer
7.25
8.17
8.37
9.281 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 wasAnswer
59
60
58
541 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 beAnswer
11
3
9
21 points Question 11
Which is the Excel function to find the right-tail p-value for Fcalc = 4.52 with n1 = 15, n2 = 12?Answer
=FDIST(4.52, 15, 12)
=FINV(4.52, 14, 11)
=FDIST(4.52, 14, 11)
=FINV(4.52, 15, 12)

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