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BA 275 Quantitative Business Methods

BA 275 Quantitative Business Methods. Agenda. Analyzing Survey Data Chi-square Test of Independence Contingency Tables Chi-square Test of a Contingency Table. Final Examination. Thursday, 12/07/06 from 7:30 – 9:20 a.m. Room: Owen 102

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BA 275 Quantitative Business Methods

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  1. BA 275Quantitative Business Methods Agenda • Analyzing Survey Data • Chi-square Test of Independence • Contingency Tables • Chi-square Test of a Contingency Table

  2. Final Examination • Thursday, 12/07/06 from 7:30 – 9:20 a.m. • Room: Owen 102 • Check the seating chart when you arrive. You must sit in the assigned seat to receive your own exam booklet. • Topics: Comprehensive • Regression analysis and Chi-square test account for 60 – 70%. • Need a calculator that works and a good night sleep. • Check email over the weekend for additional office hours during the finals week.

  3. Analyzing Survey Data • Do you own an iPod? ___Yes ___No • Do you own a flatscreen TV? ___Yes ___No • Which of the following 4 soft drinks gives you the highest satisfaction? • Type A ___ • Type B ___ • Type C ___ • Type D ___ • Your gender: ____Male ____ Female • Your nationality: _____

  4. Contingency Table

  5. Chi-square Test H0: The two classifications are independent Ha: The two classifications are dependent What is the marketing implication?

  6. Observed vs. Expected Counts

  7. Two Similar or Different Tables?

  8. Chi-square Statistic – a measure of similarity/difference Large or small? Implication?

  9. Chi-square Statistic Cutoff Degrees of freedom = (#rows – 1 ) x (#cols – 1) Reject H0 Tables look different Two classifications are DEPENDENT. Tables look similar Do not reject H0 Two classifications are INdependent.

  10. Critical Values of c2

  11. Example 1

  12. Example 2

  13. Finally …. Thank you and Good Luck

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