1. Quiz 10  Goodness-of-fit test  Test of independence

2. 1. Which distribution is used to test whether a frequency distribution fits a known pattern? a) F-ratio b) chi-squared c) Poisson d) standard normal

3. 2. If you test the “fairness” of a die what critical value would you use for a 2-tailed test at =0.05? a) 1.635 b) 1.145 c) 11.071 d) 14.449

4. 3. Which condition is NOT necessary for a goodness-of-fit test? a) data are normally distributed b) expected values must be greater than or equal to 5 c) data are from random sampling d) data are independent

5. 4. Below are the results of throwing a die 180 times. A chi-squared test using SPSS was conducted and the results are shown. What can you conclude from these data? a) not enough throws were done b) test inconclusive c) die was fair d) die was unfair

6. 5. For a “test of independence” and a contingency table of 3 rows and 4 columns how many degrees of freedom (df) are there? a) 12 b) 11 c) 10 d) 6

7. 6. Given the following SPSS output what can you conclude about the relationship between occupation and preference for an operation? a) independent b) dependent c) fit pattern d) do not fit pattern