Question

Question 6 Background Inter-Rater Reliability Test Results Two different technicians (Tech A and Tech B) each measured the cardiac output for a sample of 26 patients using Doppler Echocardiography. The supervisor would like to use this paired data to assess inter-rater reliability by testing if the population mean difference in cardiac output is 0 (no difference on average) versus the alternative that there is a difference. The hypotheses to be tested are: H0-Ha-0 versus Ha: μ8-0, using a 10% significance level Question 6 Subquestions 6.a 4 point(s) The sample mean difference in cardiac output (Tech A less Tech B) was 1.8 standard errors above 0. Provide a complete sketch of the p-value that the supervisor can include in her report. You can use the pvalue shiny app which will give the exact p-value (and allow you to add your name to the graph when you type 'y' to save the graph to your desktop), or make a complete by hand sketch and provide the p-value (bounds). Make sure to include a title for and include your name with your graph. No answer entered. Click above to enter an answer. 6.b You remember some assumption about a normal model required for the t test to be valid and want to check this condition. You recall that a QQ plot helps to assess if a population of responses can be considered normally distributed. How many QQ plots do you need to make in this case? 1 point(s) One QQ Plot of the sample of differences in measurements One QQ Plot of the population of differences in measurements Two QQ Plots, one for the sample of measurements by Tech A and one for the sample of measurements by Tech B Tech and one tor the population of measurements by Tech B Two QQ Plots, one for the population of measurements by Tech A and one for the population of measurements by Tech B

Answer 1

SOLUTION

6.b ) Answer : A. One QQ Plot of the sample of differences in measurement