The homework must be placed in the appropriate Assignments folder in Blackboard by midnight of the date shown in the Course Roadmap and Syllabus. The Assignments folder will close automatically and late submissions will not be allowed thus a score of zero (0) will be recorded for the assignment. Solutions for the assignment will be released in Bb the morning after the due date. Total points for the assignment is 80.
For the following criteria write the Ho and Ha hypotheses in the space provided.
1. The historical test average (or mean) on a Statistics test is 86. The Instructor thinks that a new teaching methodology will influence these test scores. (1 point each for a total of 2 points)
Ho:
Ha:
2. The historical test average (or mean) on a Statistics test is 74. The Instructor thinks that a new teaching methodology will increase these test scores. (1 point each for a total of 2 points)
Ho:
Ha
3. The historical test average (or mean) on a Statistics test is 92. The Department Chair thinks that the content of a new textbook may lower the test scores. (1 point each for a total of 2 points)
Ho:
Ha:
4. The historical test average (or mean) on a Statistics test is 65. A new teacher thinks that the content of a new textbook may raise these test scores. (1 point each for a total of 2 points)
Ho:
Ha:
5. The historical test average (or mean) on a Statistics test is 70. The teacher thinks that his teaching method will influence these test scores. (1 point each for a total of 2 points)
Ho:
Ha:
6. A textbook publisher claims the historical proportion of students passing the standardized statistic’s test is 77% using their textbook. The school district’s Superintendent thinks the passing rate is more than 77%. (1 point each for a total of 2 points)
Ho:
Ha:
7. Disney World claims that 60% of the couples it admits bring children. As the Marketing Manager you think this percentage is incorrect, its not 60%. (1 point each for a total of 2 points)
Ho:
Ha:
8. The historical dropout rate for seniors in your high school is 8%. The school Principal claims the percentage is greater than 8%. (1 point each for a total of 2 points)
Ho:
Ha:
9. It was recently reported by the Humane Society that 15.7% of families in your county have a pet. However, you believe the proportion of families that own pets is different, its not 15.7%. (1 point each for a total of 2 points)
Ho:
Ha:
10. As a school administrator you have calculated that historically 90% of high school freshmen girls go out for JV cheerleading. However you think this percentage is low. You think more than 90% try out. (1 point each for a total of 2 points)
Ho:
Ha:
For the following scenarios write the Ho & Ha, identify the critical value (CV) used for the decision rule, calculate the z-value test statistic and state a conclusion. Write your answer in the spaces provided. You may use Excel, Ti-84 or the chart.
11. At the local community college it has been reported the average age of first year college students is 20 years of age with a standard deviation of 7.2 years. As a college professor you believe it’s less. To test your claim you take a random sample of 200 students, the average age 19.4 years. At an alpha of 0.02 what do you conclude? (1 point each for a total of 4 points)
Ho:
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