Feedback â Week 5 Quiz
Quiz Feedback | Passion Driven Statistics
Page 1 of 5
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Feedback — Week 5 Quiz You submitted this quiz on Thu 25 Apr 2013 9:07 PM CEST +0200. You got a score of 9.00 out of 9.00.
Question 1 What does the population standard error represent?
Your Answer
Score
Explanation
j The means squared statement for the population k l m n
i The variability we would expect to see over multiple samples drawn j k l m n
✔
1.00
from the population j The statistical significance of the r-squared value k l m n
j The average correlation value k l m n
Total
1.00 / 1.00
Question 2 In statistics, when does moderation occur? Your Answer i When a relationship between two variables depends on a third j k l m n
Score ✔
Explanation
1.00
variable j When a relationship is statistically significant, but does not depict a k l m n
causal model j When a relationship is statistically significant, and also depicts a k l m n
causal model j When two variables do not correlate k l m n
Total
1.00 / 1.00
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Quiz Feedback | Passion Driven Statistics
Page 2 of 5
Question 3 A moderating variable affects the __________ of the relationship between the explanatory and response variable. Your Answer
Score
Explanation
j (a) causality k l m n j (b) strength k l m n
j (c) direction k l m n j (a) and/or (b) k l m n i (b) and/or (c) j k l m n
Total
✔
1.00 1.00 / 1.00
Question 4 Use the following output to answer questions 4-6.
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Quiz Feedback | Passion Driven Statistics
Page 3 of 5
When examining the means table, Exercise = Cardio, which diet has greater weight loss?
Your Answer i Diet A j k l m n
Score ✔
Explanation
1.00
j Diet B k l m n
Total
1.00 / 1.00
Question 5 The high F-value depicted the in the Exercise = Weights means table indicates…
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Quiz Feedback | Passion Driven Statistics
Page 4 of 5
Your Answer
Score
Explanation
j that a causal model can be implemented. k l m n j that a causal model cannot be implemented. k l m n
i that the results are unlikely to be reproduced by chance. j k l m n
✔
1.00
j that the results are likely to be reproduced by chance. k l m n
Total
1.00 / 1.00
Question 6 From these results, what conclusion can be made?
Your Answer
Score ✔
i The type of exercise moderates the relationship between diet and j k l m n
Explanation
1.00
weight loss. j The type of exercise does not moderate the relationship between diet k l m n
and weight loss. j The relationship between diet and weight loss is not statistically k l m n
significant. j The relationship between exercise and weight loss is not statistically k l m n
significant. Total
1.00 / 1.00
Question 7 Fill in the blanks for the following syntax; it is a test for moderation using Chi-Square. PROC SORT; by ____1_____; PROC FREQ; TABLES _____2____*CAT_EXPLANATORY / CHISQ; BY ____3____; Your Answer
Score
Explanation
j 1= Cat_ThirdVar; 2= Cat_ThirdVar; 3= Cat_ThirdVar; k l m n j 1= Cat_Response; 2= Cat_ThirdVar; 3= Cat_ThirdVar; k l m n i 1= Cat_ThirdVar; 2= Cat_Response; 3= Cat_ThirdVar; j k l m n
✔
1.00
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Quiz Feedback | Passion Driven Statistics
Page 5 of 5
j 1= Cat_ThirdVar; 2= Cat_ThirdVar; 3= Cat_Response; k l m n
Total
1.00 / 1.00
Question 8 In an experiment, testers apply treatments to the observations, they observe the effects the treatments have. In an observational study, testers simply observe participants and measure variables of interest without assigning treatments. Using these definitions, which of the following statements is true?
Your Answer
Score
Explanation
j Causal models can never be directly tested. k l m n j Causal models can be imposed on experiments, but not directly k l m n
tested. j Causal models can only be directly tested in observational studies. k l m n
✔
i None of the above. j k l m n
Total
1.00 1.00 / 1.00
Question 9 We cannot test causal models in observational studies because there is always the issue of…
Your Answer i a lurking/third variable j k l m n
Score ✔
Explanation
1.00
j statistical significance k l m n j type 1-errors k l m n j type 2-errors k l m n
Total
1.00 / 1.00
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Page 1 of 5
You are using an unsupported browser, so some features may not work. Please upgrade to a modern browser.
Feedback — Week 5 Quiz You submitted this quiz on Thu 25 Apr 2013 9:07 PM CEST +0200. You got a score of 9.00 out of 9.00.
Question 1 What does the population standard error represent?
Your Answer
Score
Explanation
j The means squared statement for the population k l m n
i The variability we would expect to see over multiple samples drawn j k l m n
✔
1.00
from the population j The statistical significance of the r-squared value k l m n
j The average correlation value k l m n
Total
1.00 / 1.00
Question 2 In statistics, when does moderation occur? Your Answer i When a relationship between two variables depends on a third j k l m n
Score ✔
Explanation
1.00
variable j When a relationship is statistically significant, but does not depict a k l m n
causal model j When a relationship is statistically significant, and also depicts a k l m n
causal model j When two variables do not correlate k l m n
Total
1.00 / 1.00
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Quiz Feedback | Passion Driven Statistics
Page 2 of 5
Question 3 A moderating variable affects the __________ of the relationship between the explanatory and response variable. Your Answer
Score
Explanation
j (a) causality k l m n j (b) strength k l m n
j (c) direction k l m n j (a) and/or (b) k l m n i (b) and/or (c) j k l m n
Total
✔
1.00 1.00 / 1.00
Question 4 Use the following output to answer questions 4-6.
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Quiz Feedback | Passion Driven Statistics
Page 3 of 5
When examining the means table, Exercise = Cardio, which diet has greater weight loss?
Your Answer i Diet A j k l m n
Score ✔
Explanation
1.00
j Diet B k l m n
Total
1.00 / 1.00
Question 5 The high F-value depicted the in the Exercise = Weights means table indicates…
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Quiz Feedback | Passion Driven Statistics
Page 4 of 5
Your Answer
Score
Explanation
j that a causal model can be implemented. k l m n j that a causal model cannot be implemented. k l m n
i that the results are unlikely to be reproduced by chance. j k l m n
✔
1.00
j that the results are likely to be reproduced by chance. k l m n
Total
1.00 / 1.00
Question 6 From these results, what conclusion can be made?
Your Answer
Score ✔
i The type of exercise moderates the relationship between diet and j k l m n
Explanation
1.00
weight loss. j The type of exercise does not moderate the relationship between diet k l m n
and weight loss. j The relationship between diet and weight loss is not statistically k l m n
significant. j The relationship between exercise and weight loss is not statistically k l m n
significant. Total
1.00 / 1.00
Question 7 Fill in the blanks for the following syntax; it is a test for moderation using Chi-Square. PROC SORT; by ____1_____; PROC FREQ; TABLES _____2____*CAT_EXPLANATORY / CHISQ; BY ____3____; Your Answer
Score
Explanation
j 1= Cat_ThirdVar; 2= Cat_ThirdVar; 3= Cat_ThirdVar; k l m n j 1= Cat_Response; 2= Cat_ThirdVar; 3= Cat_ThirdVar; k l m n i 1= Cat_ThirdVar; 2= Cat_Response; 3= Cat_ThirdVar; j k l m n
✔
1.00
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
Quiz Feedback | Passion Driven Statistics
Page 5 of 5
j 1= Cat_ThirdVar; 2= Cat_ThirdVar; 3= Cat_Response; k l m n
Total
1.00 / 1.00
Question 8 In an experiment, testers apply treatments to the observations, they observe the effects the treatments have. In an observational study, testers simply observe participants and measure variables of interest without assigning treatments. Using these definitions, which of the following statements is true?
Your Answer
Score
Explanation
j Causal models can never be directly tested. k l m n j Causal models can be imposed on experiments, but not directly k l m n
tested. j Causal models can only be directly tested in observational studies. k l m n
✔
i None of the above. j k l m n
Total
1.00 1.00 / 1.00
Question 9 We cannot test causal models in observational studies because there is always the issue of…
Your Answer i a lurking/third variable j k l m n
Score ✔
Explanation
1.00
j statistical significance k l m n j type 1-errors k l m n j type 2-errors k l m n
Total
1.00 / 1.00
https://class.coursera.org/pdstatistics-001/quiz/feedback?submission_id=23843
07/05/2013
