In: Statistics and Probability
Questions 18 – 28. A researcher is interested in whether psychology students are less happy than other students. The mean happiness score for the population is 8. The researcher administers a happiness scale to 25 BC students and obtains a mean of 5 and variance 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?