Fred and Ed sign a contract by which Fred agrees to deliver a washing machine on July 31 in exchange for Ed's promise to pay the $500 purchase price on July 31. The delivery of the washing machine and the payment of $500 are examples of a. conditions subsequent. b. concurrent conditions. c. illegal conditions. d. conditions precedent.

Which is cheaper: eating out or dining in? the mean cost of a flank steak, broccoli, and rice bought at the grocery store is $13.04 (money.msn website, november 7, 2012). a sample of 100 neighborhood restaurants showed a mean price of $12.75 and a standard deviation of $2 for a comparable restaurant meal. a. develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean cost of a restaurant meal is less than fixing a comparable meal at home. b. using the sample from the 100 restaurants, what is the p-value? c. at a = .05, what is your conclusion? d. repeat the preceding hypothesis test using the critical value approach