shift M 196 Chapter 8 8.9. A waitress suspects that more verbal interactions wit customers generate a higher amount of tips than fewer interactions. In order to test her suspicion, she selects every other she serves in a typical week and exchanges some verbal plegally 11. What is the value of the test statistic with her customers and says something nice about them. Wil customers at the other tables, she simply does what she usually 12. What is the decision? saying "What would you like to have?," "Thank you," etc.). in 13. What is the conclusion? situations, she tries to use the same body language. Can she cone that more verbal interactions generate more tips than fewer not interactions? 8.10. A researcher believes in the valu theory. She thinks that analytical linguistic intelligence. She randomly se city and administers two se of intel Verbal interactions Amount of daily tips in dollars by levels of verbal interactions residents take an analytical intelligence High 160 Mean Standard deviation Number of cases 40 test . The mean analytic and linguistic in Low 100 60 50 from 1 to 100) are calculated and compa 50 1. What is the research hypothesis? Intelligence test scores by ty Mean Standard Deviation Not given Not given 2. What is the null hypothesis? Analytic Not given Not given Linguistic 3. What is the independent variable? 4. What is the dependent variable? 1. What is the research hypothesis? 2. What is the null hypothesis? 5. At what level is the independent variable measured? 3. What is the independent variable? 6. At what level is the dependent variable measured? 4. What is the dependent variable? 7. Should we do a one-tailed test or a two-tailed test? Why? 5. At what level is the independent varia 8. Should we do a z-test or a t-test? Why? 6. At what level is the dependent variabl 9. What is the value of the standard error? 7. Should we do a one-tailed test or a tw 10. What is the rejection region? 8. Should we do a z-test or a t-test? Why