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

median is the value separating the higher half of a data sample, a population or probablity distribution from the lower half.

step-by-step explanation:

say you have 3,8,7,3,1,9,8 order them from lowest to highest

if orderd it would be 1,3,3,7,8,8,9 now you take away from the lowest and the highest until you end up in the middle.

so you would remove the 1 and 9 leaving you with 5 digits remaining

when you've reached the middle that would be your answer so in this case the answer is 7

if there were two numbers left say 7 and 5 you'd and them together so 12 then divide by 2 witch would equal 6 so the answer would be 6

good luck on that project hoped i you at all