Thread: stats: chi-square test stat

Solve the problem.


A coffeehouse wishes to see if customers have any preference among 5 different brands of coffee. A sample of 200 customers provided the data beolow. Calculate the chi-square test statistic χ² to test the claim that the probabilities show no preference.

Brand 1 2 3 4 5
Customers 30 55 65 18 32


how do i solve the problem?

If you have access to Excel, here's a tutorial on using it so you don't have to do the calc's by hand...which is explanatory at first and then painfully droll.


<Instructions for Chi-Square with Excel -- Del Siegle -- Educational Research>

Also...

Vassar has some great links for online chi-test calculators.
One-Way Chi-Square
Contingency Table

Originally Posted by JeanetteR

If you have access to Excel, here's a tutorial on using it so you don't have to do the calc's by hand...which is explanatory at first and then painfully droll.


<Instructions for Chi-Square with Excel -- Del Siegle -- Educational Research>

Also...

Vassar has some great links for online chi-test calculators.
One-Way Chi-Square
Contingency Table

i need to know how to do it by hand.

Originally Posted by comet2000

Solve the problem.


A coffeehouse wishes to see if customers have any preference among 5 different brands of coffee. A sample of 200 customers provided the data beolow. Calculate the chi-square test statistic χ² to test the claim that the probabilities show no preference.

Brand 1 2 3 4 5
Customers 30 55 65 18 32


how do i solve the problem?

The expected frequencies if there is no difference in preference are all 50.

Now see here for the test.

CB