Tom is the aerobics coordinator at a fitness center. He needs a more efficient way for his instructors to share information. Class schedules are updated on a regular basis. Instructors need to indicate when they cannot teach a class and other instructors need to be able to sign up to cover the class. Instructors also often attend training classes and learn new procedures. Having a place to share their learning and update procedures will benefit them and their clients. Cindy is taking a business class and told Tom about a great tool that will serve their needs. What was the technology tool Cindy told Tom about

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