A research study wishes to examine the proportion of hyperte

A research study wishes to examine the proportion of hypertensive individuals among three different groups of exercises: marathon runners, yoga, and CrossFit. Of the 78 marathon runners, 14 are hypertensive. Of the 63 yoga practioners, 6 are hypertensive. And there are 16 hypertensive subjects among the 54 CrossFit athletes. What is the critical value for the test statistic? (e.g. what number are you hoping to beat in order to show a significant finding)

Select one:

a. 1.96

b. 1.65

c. 5.99

d. 4.83

Solution

We could use a ?2 Chi Square Goodness of Fit to test for equality of proportions amongst the three groups.

When a comparison is made between multiple sample and another, a simple rule is that the degrees of freedom equal (number of columns minus one) x (number of rows minus one) not counting the totals for rows or columns. For our data this gives (2-1) x (3-1) = 2.

at 0.05 LOS fr 2 degees of freedom it is 5.99