28. Cars. A survey of autos parked in student and staff lots at a large university classified the brands by country of origin, as seen in the table. Driver Student Staff American 107 105 European 33 12 Asian 55 47 Origin

*42. Smartphone Ownership. The Pew Internet & American Life Project compiles data on smartphone ownership and publishes the results in the document Smartphone Ownership. The first two columns of the following table provide a percentage distribution for age of U.S. adults. The third column of the table shows the percentage of people in each age group who own a smartphone. Age group (years) Percentage of adults Percentage who own a smartphone 18–24 12.5 79 25–34 18.0 81 35-44 16.7 69 45–54 17.5 55 55–64 16.4 39 65+ 18.9 18 Suppose that a U.S. adult is selected at random. Determine the prob- ability that the person selected a. owns a smartphone, given that he or she is between 18 and 24 years old.

5. Find the five-number summary and the interquartile range for the given set of numbers, and then draw the box plot: 10, 11, 13, 14, 16, 17, 19, 20, 21, 23, 24 W MacBook Air F6 F7 FB F9 F10 FIT

Travel + Leisure  magazine presented its annual list of the 500 best hotels in the world. The magazine provides a rating for each hotel along with a brief description that includes the size of the hotel, amenities, and the cost per night for a double room. A sample of 12 of the top-rated hotels in the United States follows. Location Rooms Cost/Night Phoenix, AZ 220 499 Orlando, FL 727 340 Los Angeles, CA 285 585 Boston, MA 273 495 Washington DC 145 495 Ashville, NC 213 279 Phoenix, AZ 398 279 Island of Hawaii 343 455 Laguna Beach, CA 250 595 Chicago, IL 414 367 Dana Point, CA 400 675 Colorado Springs, CO 700 420 What is the sample correlation coefficient? What does it tell you about the relationship between the number of rooms and the cost per night for a double room? Does this appear reasonable? Discuss. Please show steps in Excel.