If we use the ÷2 method of analysis to test for the differences among 4 proportions, the degrees of freedom are equal to:
A) 3
B) 4
C) 5
D) 1
To determine the degrees of freedom when using the ÷2 method of analysis to test for the differences among 4 proportions, we need to calculate it using the formula:
df = (r - 1) × (c - 1)
where r is the number of rows and c is the number of columns in the contingency table.
In this case, we have 4 proportions, which means we have 4 categories. Since there is only 1 row in this scenario, r = 1. Therefore, we have:
df = (1 - 1) × (4 - 1)
= 0 × 3
= 0
Therefore, the correct answer is D) 1.
To determine the degrees of freedom in a statistical test, we need to apply the formula: degrees of freedom = k - 1, where k is the number of groups being compared. In this case, we are comparing 4 proportions, so k = 4.
Substituting k=4 into the formula, we find that the degrees of freedom = 4 - 1 = 3.
Therefore, the correct answer is A) 3.