Match the following statistics to unbiased or biased estimators of the population parameters.

Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"

Suppose we want to compare scores (which can take on any value within a specified range) at baseline and at follow-up for a given sample. Using the data in the table below, compute a 95% CI for the mean difference in scores. Subject ID Baseline Follow-Up 1 13 6 2 10 8 3 9 11 4 12 11 5 8 5

Group 1. Mean= 24.08                    Group 2. Mean= 26.5            STD Dev= 4.42                                STD Dev= 5.2            Sample Size=16                            Sample Size=16   What is tcomputed =

A. Determine the test statistic  B. What are the critical values C. What is the p value

Consider the following research questions/study scenarios. For each study, discuss the most appropriate methods for describing the data (graphically and numerically).  What statistical method would be most appropriate for addressing the research questions?  Be sure to provide justification of the statistical method.  When a statistical test is needed, provide appropriate null and research hypotheses. A study investigating the effects of second-hand smoke in working environments asked the following question: “How often do you experience second-hand smoke in a work environment/function? Never, Occasionally, Fairly Often, Very Often, Almost Always.”  The question was asked of managers and employees to determine whether there was an association between position and the amount of second-hand smoke exposure.  The responses to the questions were grouped into Little/Non and Often, where Little/None was defined as responses of Never or Occasionally and Often was defined as responses of Fairly…

A method or a set of procedures of using sample data to estimate a population parameter is called A. statistical inference B. statistical interference C. statistical appliance D. statistical description