Question: Question 8

A pharmaceutical firm has surveyed a random sample of 120 persons suffering from Parkinson’s disease. Among the facts obtained is the following bivariate frequency distribution of disease duration and degree of self-reliance:

a) Test whether disease duration and degree of self-reliance are independent, controlling the a risk at 0.01. State the alternatives, the decision rule, the value of the test statistic, and the conclusion.

b) Computer output gives a p–value of 0.006 for the contingency table test in part b). Is this value consistent with the test results in part b). Explain.