Teeth database-T test for independent samples
Assignment Instructions: Using complete sentences, answer the following questions from your analysis:
What is the mean of number of decayed, missing or filled permanent teeth among the sample of patients living In Portland?
Additionally, what is the mean of number of decayed, missing or filled permanent teeth among the sample of patients living in Seattle? (2 points —1 point for each mean)
What is the t test statistic value from the test that you performed? (1 point)
You have set your significance level at a.0.05 and performed a two-tailed t test for independent samples. Using this information and the degrees of freedom from your SPSS output, what Is the critical t value for your test? (Hint: use Table 8.2 in Appendix B In your textbook. If you don’t see the exact number of degrees of freedom In your textbook, select the critical t value that corresponds to the closest number of degrees of freedom.) (1 point)
Does your t test statistic value exceed the critical t value?
What can you conclude about patients from Seattle and Portland as a result? (1 point) (+2 extra credit if you discuss the null hypothesis in your answer, and whether you reject or fail to reject It)
