tice Assignment Gradebook ment PRINTER VERSION Chapter 7, Section 2, Exercise 03

Question

tice Assignment Gradebook ment PRINTER VERSION Chapter 7, Section 2, Exercise 033 3Incorrect. Find the expected count and the contribution to the chi-square statistic for the (Group 1, No) cell in the two-way table below. Yes No Group 1 731 251 Group 2 1168 329 Round your answer for the excepted count to one decimal place, and your answer for the contribution to the chi-square statistic to three decimal places. 360 Expected count = u 4.44 contribution to the chi-square statistic Click if you would like to Show Work for this question: geen Shosw SHOW HINT c All Rights Reserved. A Ds to searchh

Explanation / Answer

Ans:

Expected count=row total*column total/overall total

For Group 1 and No,

Expected count=580*982/2479=229.8

Chi square=(O-E)^2/E=(251-229.8)^2/229.8=1.965

(1.956,if use rounded off value of expected count)

Observed count Yes No Total Group 1 731 251 982 Group 2 1168 329 1497 Total 1899 580 2479 Expected count Yes No Total Group 1 752.2 229.8 982 Group 2 1146.8 350.2 1497 Total 1899 580 2479 Chi square=(O-E)^2/E Yes No Group 1 0.600 1.965 Group 2 0.394 1.289

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