QUESTIONS FOR CHI SQUARE (^2) GOODNESS OF FIT TEST1. SRS?2. At least 5 observations in each expected cell?3. Do the expected proportions total 1? If yes, use Chi-Square (2) degrees of freedom = (#of categories - 1)Ho: THE DATA FITS THE DISTRIBUTIONHa: THERE IS NOT A FIT

Paragraph 5. A study from a university medical center examined whether the risk of hepatitis C as related to whether people had tattoos and to where they got their tattoos. Do the data indicate that the risk of hepatitis C is unrelated to tattoo status at the 5% significance level? + Hepatitis C No Hepatitis C Tattoo, parlor 17 35 Tattoo, elsewhere 12 53 None 22 491 6. A study of people who refused to answer survey questions provided the randomly selected sample data shown in the table below. At a = .01, test the claim the cooperation of the subject response or refusal is independent of age category. Age 18-21 22-29 30-39 40-49 50-59 60 and over Responded 73 255 245 136 138 202 Refused 20 33 16 27 49