6. Which of the following represents a two tailed test? A. Ho: Hi # #2 B. Ho: Hi /2 7. If the confidence level is 90%, what is the probability of committing a type I error? A. 0.90 B. 0.10 C. 0.01 8. Which of the following is an example of a null hypothesis? A. Ho: M1 = /2 B. Ho: H1 /2 9. A social worker wants to test (at a = 0.05) whether the average body mass index (BMI) of the students under feeding program is different from 8.2 kg. State the null hypothesis. A. Ha: The average BMI of the students under feeding program is not different from 8.2 kg. B. Ho: The average BMI of the students under feeding program is not different from 8.2 kg. C. Ha: The average BMI of the students under feeding program is different from 8.2 kg. 10. A social worker wants to test (at a = 0.05) whether the average body mass index (BMI) of the students under feeding program is different from 8.2 kg. State the alternative hypothesis. A. Ho:ul = 18 B. Ho:u # 18 C. Ha: u # 18