Research Methods IV - Week 10 Factorial ANOVA III

Brage Haavik
Quiz by Brage Haavik, updated more than 1 year ago
Brage Haavik
Created by Brage Haavik over 2 years ago
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Quiz on Research Methods IV - Week 10 Factorial ANOVA III, created by Brage Haavik on 04/16/2019.

Resource summary

Question 1

Question
Assuming the data meets the assumptions of parametric tests, non-parametric tests compared to their parametric counterparts ____________.
Answer
  • Are more conservative
  • Have less statistical power
  • Are less likely to accept the alternative hypothesis
  • All of the above

Question 2

Question
A researcher measured leadership skills in doctors, police officers and accountants. The data were skewed. What is the most appropriate test to analyse the data?
Answer
  • Kruskal-wallis test
  • Friedman test
  • Wilcoxon test
  • Mann-whitney test

Question 3

Question
The results of the test used to analyze the data described in question 2 showed a significant result. How should the researcher carry out post-hoc tests?
Answer
  • Compare groups using Mann-whitney test
  • Compare groups using Wilcoxon test
  • Compare groups using t-Test
  • Non of the above. Post-hoc analyses can not be carried out with non-parametric data

Question 4

Question
An advantage of non parametric statistics is that ____________.
Answer
  • They are easy to calculate
  • They are very powerful
  • You need a computer to calculate them
  • They have many assumptions to meet

Question 5

Question
Which of the following tests is analogous to a standard within-subjects ANOVA?
Answer
  • Friedman
  • Kruskal-wallis
  • Wilcoxon
  • Mann-whitney

Question 6

Question
Tied scores (when two or more scores have the same value) may present a problem in non-parametric tests. The way to deal with them in a Kruskal-Wallis test is to
Answer
  • Throw out the tied data
  • Assign any tied values the lower of the ranks they would have recieved had they not been tied
  • Use a random number table to assign ranks to the tied values
  • Assign any tied values the average of the ranks they would have recieved had they not been tied

Question 7

Question
A data-set contains the following values: 23, 28, 37, 23, 45, 49, 37, 62. Rank the values. Which rank is associated with value 37?
Answer
  • 4
  • 4.5
  • 3.5
  • 6

Question 8

Question
Researchers wanted to examine whether the 'sea-food' diet was effective. A group of volunteers were placed on the diet and their weight (in kilograms) was measured at the beginning of the diet, after 1 month, after 2 months, then at the end of the diet after 3 months. The data were not normally distributed. Which test would be appropriate to analyse the data?
Answer
  • Friedman
  • Wilcoxon
  • Kruskal-Wallis
  • Mann-Whitney

Question 9

Question
The output from the study described in question 8 is shown below. What is the correct way to report these results?
Answer
  • The weight of the participants did not significantly change during the diet, x2 (3) = .60, p = .89
  • The weight of the participants did significantly changed during the diet, x2 (3) = .60, p > .05
  • The weight of the participants did not significantly change during the diet, x2 (3) = .60, p = .90
  • The weight of the participants did significantly changed during the diet, x2 (3) = .60, p < .05

Question 10

Question
In a Kruskal-Wallis test, the ____________ the value of H, the more likely you are to reject the null hypothesis
Answer
  • More negative
  • Smaller
  • Larger
  • H is not relevant for the Kruskal-Wallis test
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