Question

Co 38. Does Christine now reject or fail to reject (FTR) Ho and for what reason? FTR because isl<\td b) reject because p-value< α reject because s) reject because p-value >a c) FTR because p-value<a weighs 23 data, and determine the 39. What test do they use and why? a) t-test because it's a sample s.d. c) z-test because it's a large enough sample d) z-test because it's a sample s.d. b) t-test because the sample is small e) none of these 40. The test is not significant at α-.01. However, using the p-value, how confident are we of the test result? a) 95.24% b) 96.88% c) 98.12% d) 99.06% e) none of these When Europeans first came to Australia, they thought that Koalas looked like bears and in fact that they were bears so they were often called 'Koala bears'. Koalas are not bears-they are marsupials and their correct name is Koalas Though often called the koala "bear, this cuddly animal is not a bear at all; it is a marsupial, or pouched mammal. After giving birth, a female koala carries her baby in her pouch for about six months wwwtoda

Answer 1

38. b and d are correct options. Null hypothesis is FTR as is in its present condition. From b, the p-value is less than the level of significance value of alpha, so we reject null hypothesis. From d, t-test statistics value of ts is less than critical t value of tc, so we reject null hypothesis. Otherwise we fail to reject null hypothesis.

39. Option a and b are correct. Because we use t-test for the sample size 23 is small that is less than 30. Since we do not know the population standard deviation, with the standard deviation of a sample, we do t-test to make a decision about the claims.

40. Correct answer is e. At the level of confidence of 0.01, we are 99% confident that the identical and independent samples in large enough numbers will fail to reject the current belief in the condition of the claim. So the test is not statistically significant. And not a good-fit model.