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Exam 7: Analysis of Variance

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Question 1

Multiple Choice

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If means for a two-way ANOVA were plotted on a graph, an interaction effect might be indicated by:

A) Parallel lines
B) Curved lines
C) Crossed lines
D) None of the above

E) A) and B)
F) B) and D)

Correct Answer

verified

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Question 2

Multiple Choice

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Which of the following is a post hoc test?

A) Tukey's HSD test
B) Greenhouse-Geisser test
C) Planned comparisons test
D) Mauchly test

E) C) and D)
F) All of the above

Correct Answer

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A

Question 3

Multiple Choice

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In an RM-ANOVA, what is removed from the error term (within-subjects variation) ?

Questions pertain to the following table (Table 7) , which presents fictitious results regarding the effects of guided imagery on pain outcomes among patients with cancer. $\begin{array}{c}\text { Table 7 } \\\text { Physiologic Outcomes for Patients with Emphysema during Exercise Performance } \\\text { Under Three Different Conditions (N= 50) } \\\begin{array}{|l|c|c|c|c|c|}\hline \text { Physiologic Outcome } & \begin{array}{c}\text { Control } \\\text { Condition }\\\\\text { Mean } \pm S D\end{array} & \begin{array}{c}\text { With Admin- } \\\text { istration of } \\\text { Oxygen } \\\text { Mean } \pm S D\end{array} & \begin{array}{c}\text { With } \\\text { Compressed } \\\text { Air } \\\text { Mean } \pm S D\end{array} & \boldsymbol{F} & \boldsymbol{p} \\\hline \text { Dyspnean rating }(1-10) & 4.70 \pm 2.3 & 4.77 \pm 2.6 & 5.09 \pm 2.6 & 4.99 & .008 \\\hline \text { Heart rate (bpm) } & 121.1 \pm 13.6 & 126.9 \pm 19.9 & 126.0 \pm 21.1 & 12.54 & <.001 \\\hline \text { Oxygen saturation, } \mathrm{SPO}_{2}(\%) & 91.0 \pm 3.9 & 94.4 \pm 4.0 & 89.9 \pm 4.1 & 9.80 & <.001 \\\hline \text { Breaths per minute } & 24.1 \pm 4.8 & 24.3 \pm 5.9 & 28.8 \pm 6.5 & 1.86 & .22 \\\hline\end{array}\end{array}$ -Refer to Table 7. For which outcome would the researcher need to accept the null hypothesis?

Which of the following is true about RM-ANOVA?

In a basic one-way ANOVA, what components are being contrasted?

RM-ANOVA might be appropriate for which of the following experimental designs?

The basic alternative hypothesis in ANOVA is:

Questions pertain to the following table (Table 7) , which presents fictitious results regarding the effects of guided imagery on pain outcomes among patients with cancer. $\begin{array}{c}\text { Table 7 } \\\text { Physiologic Outcomes for Patients with Emphysema during Exercise Performance } \\\text { Under Three Different Conditions (N= 50) } \\\begin{array}{|l|c|c|c|c|c|}\hline \text { Physiologic Outcome } & \begin{array}{c}\text { Control } \\\text { Condition }\\\\\text { Mean } \pm S D\end{array} & \begin{array}{c}\text { With Admin- } \\\text { istration of } \\\text { Oxygen } \\\text { Mean } \pm S D\end{array} & \begin{array}{c}\text { With } \\\text { Compressed } \\\text { Air } \\\text { Mean } \pm S D\end{array} & \boldsymbol{F} & \boldsymbol{p} \\\hline \text { Dyspnean rating }(1-10) & 4.70 \pm 2.3 & 4.77 \pm 2.6 & 5.09 \pm 2.6 & 4.99 & .008 \\\hline \text { Heart rate (bpm) } & 121.1 \pm 13.6 & 126.9 \pm 19.9 & 126.0 \pm 21.1 & 12.54 & <.001 \\\hline \text { Oxygen saturation, } \mathrm{SPO}_{2}(\%) & 91.0 \pm 3.9 & 94.4 \pm 4.0 & 89.9 \pm 4.1 & 9.80 & <.001 \\\hline \text { Breaths per minute } & 24.1 \pm 4.8 & 24.3 \pm 5.9 & 28.8 \pm 6.5 & 1.86 & .22 \\\hline\end{array}\end{array}$ -Refer to Table 7. What were the degrees of freedom between (df treatment) in these analyses?

If a researcher found a significant interaction effect, it would mean that:

Which of the following is not true?

If the null hypothesis in an ANOVA situation were true, over the long run the value of F would be:

Questions pertain to the following table (Table 7) , which presents fictitious results regarding the effects of guided imagery on pain outcomes among patients with cancer. $\begin{array}{c}\text { Table 7 } \\\text { Physiologic Outcomes for Patients with Emphysema during Exercise Performance } \\\text { Under Three Different Conditions (N= 50) } \\\begin{array}{|l|c|c|c|c|c|}\hline \text { Physiologic Outcome } & \begin{array}{c}\text { Control } \\\text { Condition }\\\\\text { Mean } \pm S D\end{array} & \begin{array}{c}\text { With Admin- } \\\text { istration of } \\\text { Oxygen } \\\text { Mean } \pm S D\end{array} & \begin{array}{c}\text { With } \\\text { Compressed } \\\text { Air } \\\text { Mean } \pm S D\end{array} & \boldsymbol{F} & \boldsymbol{p} \\\hline \text { Dyspnean rating }(1-10) & 4.70 \pm 2.3 & 4.77 \pm 2.6 & 5.09 \pm 2.6 & 4.99 & .008 \\\hline \text { Heart rate (bpm) } & 121.1 \pm 13.6 & 126.9 \pm 19.9 & 126.0 \pm 21.1 & 12.54 & <.001 \\\hline \text { Oxygen saturation, } \mathrm{SPO}_{2}(\%) & 91.0 \pm 3.9 & 94.4 \pm 4.0 & 89.9 \pm 4.1 & 9.80 & <.001 \\\hline \text { Breaths per minute } & 24.1 \pm 4.8 & 24.3 \pm 5.9 & 28.8 \pm 6.5 & 1.86 & .22 \\\hline\end{array}\end{array}$ -Refer to Table 7. Which statistical test is most likely being reported in this table?

Questions pertain to the following table (Table 7) , which presents fictitious results regarding the effects of guided imagery on pain outcomes among patients with cancer. $\begin{array}{c}\text { Table 7 } \\\text { Physiologic Outcomes for Patients with Emphysema during Exercise Performance } \\\text { Under Three Different Conditions (N= 50) } \\\begin{array}{|l|c|c|c|c|c|}\hline \text { Physiologic Outcome } & \begin{array}{c}\text { Control } \\\text { Condition }\\\\\text { Mean } \pm S D\end{array} & \begin{array}{c}\text { With Admin- } \\\text { istration of } \\\text { Oxygen } \\\text { Mean } \pm S D\end{array} & \begin{array}{c}\text { With } \\\text { Compressed } \\\text { Air } \\\text { Mean } \pm S D\end{array} & \boldsymbol{F} & \boldsymbol{p} \\\hline \text { Dyspnean rating }(1-10) & 4.70 \pm 2.3 & 4.77 \pm 2.6 & 5.09 \pm 2.6 & 4.99 & .008 \\\hline \text { Heart rate (bpm) } & 121.1 \pm 13.6 & 126.9 \pm 19.9 & 126.0 \pm 21.1 & 12.54 & <.001 \\\hline \text { Oxygen saturation, } \mathrm{SPO}_{2}(\%) & 91.0 \pm 3.9 & 94.4 \pm 4.0 & 89.9 \pm 4.1 & 9.80 & <.001 \\\hline \text { Breaths per minute } & 24.1 \pm 4.8 & 24.3 \pm 5.9 & 28.8 \pm 6.5 & 1.86 & .22 \\\hline\end{array}\end{array}$ -Refer to Table 7. Which of the following statements is true, based on information in Table 7?

Between-group variation in ANOVA involves differences between _______ to the ________.

Two-way ANOVA might be appropriate for which of the following experimental designs?

To look up an F statistic in a table to assess its significant, how many different degrees of freedom would be needed to obtain a value?

What distinguishes analysis of variance (ANOVA) from t-tests?

The formula for the F ratio involves dividing a _______ by a _______.

The __________ can be used to adjust _________ when one of the assumptions for RM-ANOVA cannot be met.