Clustering should be done on samples of at least 300 or more

Which of the following holds true for Medicare?

I. Medicare covers all expenses if medically necessary. II. Medicare part B helps cover doctor services, outpatient care, and other items that part A does not cover. III. Medicare supplemental insurance plans fill in the gaps that the original Part A and Part B do not cover. IV. Medicare is paid to people under 65 if they have a disability for at least 24 months. A) I, III, & IV B) I, II, & III C) I & IV D) II, III & IV

Which of the following best explains why you cannot use the price of rolled oats at a local supermarket as the competitive market value of rolled oats?

A) You can buy the oats at the price posted by the store, but the store will not buy oats from you for the same price. B) The posted prices of oats can vary widely between grocery stores, even within the same local area. C) Grocery stores mark up the prices of their oats up to make a profit. D) Grocery stores typically sell oats in different packaging, which results in different prices within the same store.