Diff rel gof-fit - jejit - practice (2)
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The document discusses three types of statistical analyses: difference, relationship, and goodness of fit. It provides examples to illustrate each type. Difference refers to comparing two groups on an outcome, such as comparing younger and older drivers' average driving speeds. Relationship examines whether a change in one variable causes a change in another, like whether increased age impacts flexibility. Goodness of fit determines how well a claim matches reality, such as whether a dentist's recommendation of flavored floss matches friends' experiences.
Diff rel gof-fit - jejit - practice (2)
- 1. Difference – How do two or more groups (younger/older drivers) compare with one another in terms of some outcome (average driving speed)? Central Tendency, Spread, or Symmetry? vs.
- 2. Difference – How do two or more groups (younger/older drivers) compare with one another in terms of some outcome (average driving speed)? Central Tendency, Spread, or Symmetry? Relationship – Does an increase in one characteristic (age) cause a change in another characteristic (flexibility)? vs.
- 3. Difference – How do two or more groups (younger/older drivers) compare with one another in terms of some outcome (average driving speed)? Central Tendency, Spread, or Symmetry? Relationship – Does an increase in one characteristic (age) cause a change in another characteristic (flexibility)? Goodness of Fit – Does your claim (4 out of 5 dentist recommend flavored floss) fit reality (3 out of 5 of your dentist friends recommend flavored floss)? vs. fitDoes the CLAIM . . . REALITY?
- 5. Difference Relationship Goodness of Fit Does employee moral increase significantly the longer they work at this company? You sample a group of 45 and generalize the results.
- 6. Difference Relationship Goodness of Fit Does employee moral increase significantly the longer they work at this company? You sample a group of 45 and generalize the results.
- 7. Difference Relationship Goodness of Fit Does employee moral increase significantly the longer they work at this company? You sample a group of 45 and generalize the results.
- 8. Difference Relationship Goodness of Fit Does employee moral increase significantly the longer they work at this company? You sample a group of 45 and generalize the results. Relationship – Does an increase in one characteristic (time worked) cause a change in another characteristic (employee moral)?
- 9. Next Example
- 10. How do management and staff compare in terms of work satisfaction? You sample both groups and generalize the results. Difference Relationship Goodness of Fit
- 11. How do management and staff compare in terms of work satisfaction? You sample both groups and generalize the results. Difference Relationship Goodness of Fit
- 12. How do management and staff compare in terms of work satisfaction? You sample both groups and generalize the results. Difference Relationship Goodness of Fit Difference – How do two or more groups (management/staff) compare with one another in terms of some outcome (work satisfaction)?
- 13. How do management and staff compare in terms of work satisfaction? You sample both groups and generalize the results. Difference Relationship Goodness of Fit Difference – How do two or more groups (management/staff) compare with one another in terms of some outcome (work satisfaction)?
- 14. Final Example
- 15. A salesman claims that 95% of employees increase their work productivity using his software. You test that claim with a sample of 26 employees and find that 86% increase their productivity. Difference Relationship Goodness of Fit
- 16. A salesman claims that 95% of employees increase their work productivity using his software. You test that claim with a sample of 26 employees and find that 86% increase their productivity. Difference Relationship Goodness of Fit
- 17. A salesman claims that 95% of employees increase their work productivity using his software. You test that claim with a sample of 26 employees and find that 86% increase their productivity. Difference Relationship Goodness of Fit Goodness of Fit – Does your claim (95% increase work productivity) fit reality (86% increase work productivity)?
- 18. A salesman claims that 95% of employees increase their work productivity using his software. You test that claim with a sample of 26 employees and find that 86% increase their productivity. Difference Relationship Goodness of Fit Goodness of Fit – Does your claim (95% increase work productivity) fit reality (86% increase work productivity)?