Step 4: Make decision. (Select A or B) A. Reject H0 B. Retain H0 Decision = Conclusion. (Select A, B, or C) A. There is no statistical difference in recycling behavior between people who have pessimistic vs. optimistic attitudes toward eco-friendly behaviors. B. People who have pessimistic attitudes toward eco-friendly behaviors recycled significantly more often than those who have optimistic attitudes. C. People who have optimistic attitudes toward eco-friendly behaviors recycled significantly more often than those who have pessimistic attitudes. Conclusion = Effect Size. Calculate the value of the effect size using Cohen's d (NOT eta-squared). d = (use 2 dec places) Is the effect size small, medium, or large? =
Step 4: Make decision.
(Select A or B)
A. Reject H0
B. Retain H0
Decision =
Conclusion.
(Select A, B, or C)
A. There is no statistical difference in recycling behavior between people who have pessimistic vs. optimistic attitudes toward eco-friendly behaviors.
B. People who have pessimistic attitudes toward eco-friendly behaviors recycled significantly more often than those who have optimistic attitudes.
C. People who have optimistic attitudes toward eco-friendly behaviors recycled significantly more often than those who have pessimistic attitudes.
Conclusion =
Effect Size.
Calculate the value of the effect size using Cohen's d (NOT eta-squared).
d = (use 2 dec places)
Is the effect size small, medium, or large? =
![Q21. Individual actions can play a large role in the overall health of our planet. A researcher interested in evaluating environmentally friendly
behaviors evaluated how often people recycle (per month) based on based on whether they have an overall optimistic or an overall
pessimistic attitude toward eco-friendly behaviors. The results from this hypothetical study are given in the table below. Test the hypothesis
that the number of complaints changed after the new policy, using a two-tailed test, a = .05.
Pessimistic
Optimistic
3
4
9
4
6.
8.
1
9.
3
6.
8
6.
10, M = 2.9, SS = 40.9, s? = 4.54
Optimistic: n = 10, M = 6.8, SS = 25.6, s? = 2.84
Pessimistic:n =
%3D
m LO O](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6b1f7062-f9cf-4e3a-8fbc-109fb54c73a0%2F9e4d72f7-5406-4156-ac39-df422b482f0c%2Fq43njh4_processed.png&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![Big Ideas Math A Bridge To Success Algebra 1: Stu…](https://www.bartleby.com/isbn_cover_images/9781680331141/9781680331141_smallCoverImage.jpg)
![Glencoe Algebra 1, Student Edition, 9780079039897…](https://www.bartleby.com/isbn_cover_images/9780079039897/9780079039897_smallCoverImage.jpg)
![College Algebra (MindTap Course List)](https://www.bartleby.com/isbn_cover_images/9781305652231/9781305652231_smallCoverImage.gif)
![Big Ideas Math A Bridge To Success Algebra 1: Stu…](https://www.bartleby.com/isbn_cover_images/9781680331141/9781680331141_smallCoverImage.jpg)
![Glencoe Algebra 1, Student Edition, 9780079039897…](https://www.bartleby.com/isbn_cover_images/9780079039897/9780079039897_smallCoverImage.jpg)
![College Algebra (MindTap Course List)](https://www.bartleby.com/isbn_cover_images/9781305652231/9781305652231_smallCoverImage.gif)
![College Algebra](https://www.bartleby.com/isbn_cover_images/9781938168383/9781938168383_smallCoverImage.gif)