Question 15 A medical researcher wanted to compare two different methods (A and B) for measuring cardiac output (L/min). Method A is the "gold standard" but is Tries remaining: invasive (involves inserting a catheter into the main heart artery). Method B is less accurate but is non-invasive. To control for differences between persons, both methods are used on each person participating in the study. This allows measurements to be directly compared for each method, per Marked out of individual. Cardiac output for 15 subjects was measured by both methods and some summary statistics of the data are summarized in the table 11.00 below. Is there enough evidence to conclude that the cardiac output for method B is less than the cardiac output for method A on average at a Flag significance level of 0.1. question Cardiac Method n Average Standard deviation A 15 5.7 1.57 B 15 5.11 1.85 Difference (d = A - B) 15 0.59 0.69 Perform a statistical test. (a) What are the null and alternative hypotheses? Ho: P 0 HA: P O A (b) What is the test statistic? (Round your answer to 3 decimal places, if needed.) (c) Using the statistical table, the p-value is 0.005