Quiz week 2

What is the alternate hypothesis in a problem where sales group two is predicted to be “. . . significantly less productive than sales group one?” @Answer found in sections 4.3 The One-sample t-Test and 4.4 Hypothesis Testing, in Statistics for Managers (Points : 1)

Question 2. 2. The desired sample size depends only the size of the population to be tested. (Points : 1)

Question 3. 3. The independent t-test is based on which distribution? @Answer found in section 4.5 The Independent Samples t-Test, in Statistics for Managers (Points : 1)

Question 4. 4. What is the probability of type II error when the null hypothesis is rejected? @Answer found in section 4.3 The One-sample t-Test, in Statistics for Managers   (Points : 1)

Question 5. 5. What is the relationship between the power of a statistical test and decision errors? @Answer found in section 4.3 The One-sample t-Test, in Statistics for Managers (Points : 1)

Question 6. 6. Random samples always accurately reflect the population they were drawn from. (Points : 1)

Question 7. 7. Type I errors may occur with ______ results and type II errors with ______ results. @Answer found in section 4.5 The Independent Samples t-Test, in Statistics for Managers (Points : 1)

Question 8. 8. Large differences in the numerator of a statistical test for differences for means are the only critical factor in determining statistical significance. (Points : 1)

Question 9. 9. According to the central limit theorem, a population which is skewed to begin with will still be skewed when it is re-formed as a distribution of sample means. (Points : 1)

Question 10. 10. The critical value of t to determine statistical significance depends on the sample size. (Points : 1)