QUESTION 1 In one-way ANOVA, the variances for all populations are assumed to be the same. True False XXXXXXXXXXpoints QUESTION 2 The Bonferroni technique can only be used when there are more than two...

QUESTION 1

1. In one-way ANOVA, the variances for all populations are assumed to be the same.

   True

   False

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QUESTION 2

1. The Bonferroni technique can only be used when there are more than two groups.

   True

   False

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QUESTION 3

1. A one-way ANOVA's null hypothesis states that at least two of the population means are equal.

   True

   False

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QUESTION 4

1. Following a significant ANOVA results with multiple independent samplest-tests is not recommended because of inflated type I error rates.

   True

   False

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QUESTION 5

1. ANOVA can only be used on variables where the means can be calculated. Thus, it can only be used with dependent variables measured at:

   		ratio-level only
   		any level of measurement
   		interval-level only
   		interval or ratio level

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QUESTION 6

1. Variability that is due to the different treatments that the groups receive is called:

   		between-group variability
   		a factor score
   		within-group variability
   		a treatment effect

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QUESTION 7

1. In theFratio, _____________ is the denominator.

   		factor scores
   		within-group variability
   		treatment effect
   		between-group variability

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QUESTION 8

1. Which of the following shows the correct APA style for results from an ANOVA?

   		F(12) = 6.15,p> .05
   		F(3, 12) = 6.15,p
   		Ftotal(df = 3) = 6.15, p
   		F = 6.15,pdf= 3, 12

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QUESTION 9

1. Use the Im et al. article to answer this question. What table displays the ANOVA results?

   		Table 1
   		Table 2
   		Table 3
   		Table 4
   		Table 5

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QUESTION 10

1. Use the Im et al. article to answer this question. How many groups were compared in the ANOVA?

   		2
   		3
   		4
   		5

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QUESTION 11

1. Use the attached dataset (Tooth Growth) to answer the following questions. The data set tests the effect of vitamin C on tooth growth in guinea pigs. The response is the length of odontoblasts (cells responsible for tooth growth) in 60 guinea pigs. Each animal received one of three dose levels of vitamin C (0.5, 1, and 2 mg/day) by one of two delivery methods, (orange juice or ascorbic acid (a form of vitamin C and coded as VC).

   Variables are as follows:

   [1]len = Tooth length

   [2]supp = Factor supplement type (VC or OJ).

   [3]dose = Dose in milligrams/day

   
   
   1. After running a one-way ANOVA on the variables of supplement dose and tooth length, were we able to reject the null hypothesis (The means of the dose groups are not statistically different)?
   
   

   		Yes
   		No

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QUESTION 12

1. What was the p-value from the ANOVA table?

   
   

   		0.050
   		0.030
   		0.001
   		0.065

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QUESTION 13

1. Was the Levene’s test for equality of variance significant?

   
   

   		Yes
   		No

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QUESTION 14

1. Which dose of supplement had the highest mean of tooth growth?

   
   

   		500
   		1000
   		2000