Quiz 5: Statistics Concepts and Hypothesis Testing - Prof. Spencer Muse, Quizzes of Data Analysis & Statistical Methods

Download Quiz 5: Statistics Concepts and Hypothesis Testing - Prof. Spencer Muse and more Quizzes Data Analysis & Statistical Methods in PDF only on Docsity! ST 301: Quiz 5 By handing in this completed exam, I state that I have neither given nor received assistance from another person during the exam period. I have used no resources other than the exam itself and the mathematical functions of a calculator (ie, no notes, electronic communication, notes stored in calculator memory, etc.). I have not copied from another person’s paper. I understand that the penalty if I am found guilty of any such cheating will include failure of the course and a report to the NCSU Office of Student Conduct. Name: SHOW YOUR WORK for any numerical calculations. Numerical answers with no supporting work or explanation will receive zero credit, EVEN IF THE NUMERICAL ANSWER IS CORRECT. Definitions. (5 points each) Clearly define each of the following terms. 1. Significance level: 2. P-value: 3. Null hypothesis: Multiple Choice. (5 points each) Select the one best answer. 4. A small P-value suggests that a. The null hypothesis is true. b. The null hypothesis is false. c. The sample size is too small 5. When testing the null hypothesis that µ = 10, which of the following is a valid alternative hypothesis? a. µ = 20 b. µ > 10 c. p > 10 6. The significance level for a test is smaller when: a. The sample size is large b. The sample size is small c. The user chooses for it to be smaller 7. When testing the alternative hypothesis HA : µ < 50 we take a sample and find X = 45. The P-value of the test is a. P(µ < 45), computed assuming that µ = 50 b. P( X < 45), computed assuming that µ = 50 c. P( X < 45), computed assuming that µ < 50