CHISQUARE GOODNESS OF FIT TEST By Laura Hasley

CHI-SQUARE GOODNESS OF FIT TEST By: Laura Hasley Statistics Gr. 12

WHAT IS X 2 ? Parameter Sum of relative difference: (O-E)2/E Always positive X 2 and p-values Distribution

RUNNING THE TEST 1. Name the test 2. State null hypothesis 3. State alternative hypothesis 4. Significance Level

RUNNING THE TEST (CONT. ) 5. Conditions RS Expected count > 5 6. Sketch the distribution 7. Calculate X 2 and d. F 8. Find P-value

INTERPRETING P-VALUE P-value < significance level P-value > significance level

DIFFERENT X 2 TESTS Goodness of Fit Relationship between observed and expected values Test of Independence Tests to see if two data factors are independent Proportions Contingency Table

BIBLIOGRAPHY Graph on slide 2 -https: //onlinecourses. science. psu. edu/stat 100/node/32 HO and HA symbols on slide 3 - http: //www. psychology. emory. edu/clinical/bliwise/Tutorials/SPOWER/spo whtest. htm Alpha symbol on slide 3 -http: //blog. minitab. com/blog/michelleparet/alphas-p-values-confidence-intervals-oh-my Graph on slide 4 http: //moore 7 oddanswers. wikispaces. com/++++12++++11 Rejected picture on slide 5 - http: //www. jasonshen. com/2010/the-rejectiontherapy-challenge-week-1/ Accepted picture on slide 5 -http: //depositphotos. com/3654522/stock-photo -Rejected-and-accepted-stamps. html Red circle with slash through it on slide 5 -Microsoft Office Word