Using a global-positioning-system (GPS)-based navigator for your car, you enter a destination and the system will plot a route, give spoken turn-by-turn directions, and show your progress along the route. Today, even budget units include features previously available only on more expensive models. Consumer Reports conducted extensive tests of GPS-based navigators and developed an overall rating based on factors such as ease of use, driver information, display, and battery life. The following data show the price and rating for a sample of 20 GPS units with a 4.3-inch screen that Consumer Reports tested (Consumer Reports website, April 17, 2012).
Brand and Model | Price ($) | Rating |
Garmin Nuvi 3490LMT | 400 | 82 |
Garmin Nuvi 3450 | 330 | 80 |
Garmin Nuvi 3790T | 350 | 77 |
Garmin Nuvi 3790LMT | 400 | 77 |
Garmin Nuvi 3750 | 250 | 74 |
Garmin Nuvi 2475LT | 230 | 74 |
Garmin Nuvi 2455LT | 160 | 73 |
Garmin Nuvi 2370LT | 270 | 71 |
Garmin Nuvi 2360LT | 250 | 71 |
Garmin Nuvi 2360LMT | 220 | 71 |
Garmin Nuvi 755T | 260 | 70 |
Motorola Motonab TN565t | 200 | 68 |
Motorola Motonab TN555 | 200 | 67 |
Garmin Nuvi 1350T | 150 | 65 |
Garmin Nuvi 1350LMT | 180 | 65 |
Garmin Nuvi 2300 | 160 | 65 |
Garmin Nuvi 1350 | 130 | 64 |
Tom Tom VIA 1435T | 200 | 62 |
Garmin Nuvi 1300 | 140 | 62 |
Garmin Nuvi 1300LM | 180 | 62 |
- a. Develop a
scatter diagram with price as the independent variable. - b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?
- c. Use the least squares method to develop the estimated regression equation.
- d. Predict the rating for a GPS system with a 4.3-inch screen that has a price of $200.
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Chapter 14 Solutions
Statistics for Business & Economics, Revised (MindTap Course List)
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