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Win/Loss and With/Without Joe: Joe plays basketball for the Wildcats and missed some of the season...

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Basic Math

Win/Loss and With/Without Joe: Joe playsbasketball for the Wildcats and missed some of the season due to aninjury. The win/loss record with and without Joe is summarized inthe contingency table below.

Observed Frequencies: Oi's

WinsLossesTotals
With Joe15722
Without Joe61218
Totals211940


The Test: Test for a significant dependentrelationship between wins/losses and whether or not Joe played.Conduct this test at the 0.01 significance level.

(a) What is the test statistic? Round your answer to 3decimal places.

?2

=

(b) What is the conclusion regarding the null hypothesis?

reject H0 fail to rejectH0    


(c) Choose the appropriate concluding statement.

We have proven that Joe causes the team to do better. Theevidence suggests that the outcome of the game is dependent uponwhether or not Joe played.      There is notenough evidence to conclude that the outcome of the game isdependent upon whether or not Joe played. We have proven that theoutcome of the game is independent of whether or not Joeplayed.

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