Flashcards in Null and Alternative Hypotheses Deck (7)
Loading flashcards...
1
you are measuring the difference between a sample average and the average of a standardized population; your computed t is 1.56 and your critical t from Appendix B is 2.56
what is your null? do you accept or reject it?
Ho: sample mean = population mean
accept the null because the computed t is less than the critical t
2
you are measuring the difference between the average of a group that is independent than that of another group's average; your computed t is 2.064 and your critical t from Appendix B is also 2.064
what is your null? do you accept or reject it?
Ho: independent sample mean = other independent sample mean
reject the null because the computed t is equal compared to the critical t
3
you are measuring the difference between a group of students' test a score and their test b score (which was administered six months after test a); your computed t is 4.74 and your critical t from Appendix B is 2.16
what is your alternative hypothesis? do you accept or reject it?
Ha1: mean test a score
4
the smaller the t....
the greater the uncertainty
5
What do you need to know to enter Appendix B?
degrees of freedom (df)
one tailed or two tailed test?
alpha level
6
2 tailed
no prior research, cannot assume 1 alternative is illogical or impossible to achieve
7