Achi-square test for independence is used to evaluate the relationship between two variables. if both variables are classified into two categories, then what is the df value for the chi-square statistic?

df = (r - 1) * (c - 1)

Step-by-step explanation:

Chi square is calculated when simple random sampling is known and variable are categorical.

Four steps are included in chi-square:

(1) state the hypotheses

(2) formulate an analysis plan

(3) analyze sample data

(4) interpret results.

State the hypothesis is

null  hypothesis: Variable a and variable b are independent.

H 1: Variable a and variable bare not independent.

Formulate analysis plan:

This plan describe the significance level and test statistic.

Analyze the sample data

We analyze the degree of freedom and expected frequencies.

The degree of freedom formula is

df = (r - 1) * (c - 1)

r = number of levels for one categorical variable

c = number of levels for the other categorical variable

  4 + 22x − 1 = 0

Step-by-step explanation:

Start off with the standard formula to finding area with polynomials and quadratic functions.

(2x + 5)(2x + 6)

Work out like a normal binomial.

4 + 22x + 30 - 31

(You're subtracting 31 to take out the minimum of what the frame has to be)

4 + 22x - 1 = 0