Imagine that you know the total sample size and marginal tot

Imagine that you know the total sample size and marginal totals for a 2x2 contingency table. You also know the observed proportion of people who fall into each cell. What must you do prior to conducting a chi-square test of independence with one degree of freedom?

Question 7 options:

Nothing. You already have everything you need to conduct the test appropriately.

Adjust your degrees of freedom from 1 to 3.

Calculate the expected proportion of people for each cell.

Convert your observed proportions into observed frequencies.

Solution

Adjust your degrees of freedom from 1 to 3.

Calculate the expected proportion of people for each cel

Reason: chi-square test of independence , Degrees of freedom for 2*2 contigency is set to n-1 = 4-1 = 3. Calculated expected prportion of people for each cell & proceed to find chisquare statistic