Questions 18 – 28. A researcher is interested in whetherpsychology students are less happy than other students. The meanhappiness score for the population is 8. The researcher administersa happiness scale to 25 BC students and obtains a mean of 5 andvariance of 49.The researcher uses an alpha level of 0.05.
18. Is this a one- or two-tailed test?
19. What is the null hypothesis?
20. What is the alternative hypothesis?
21. What are the degrees of freedom?
22. What is t critical?
23. What is the standard error?
24. What is the t statistic (t obtained)?
25. What decision would you make about H0?
26. What can you conclude?
27. What is the effect size?
28. What does this effect size mean?
