Question: A market research study is undertaken to test which of
A market research study is undertaken to test which of two popular electric shavers, a model made by Norelco or a model made by Remington, is preferred by consumers. A random sample of 25 men who regularly use an electric shaver, but not one of the two models to be tested, is chosen. Each man is then asked to shave one morning with the Norelco and the next morning with the Remington, or vice versa. The order, which model is used on which day, is randomly chosen for each man. After every shave, each man is asked to complete a questionnaire rating his satisfaction with the shaver. From the questionnaire, a total satisfaction score on a scale of 0 to 100 is computed. Then, for each man, the difference between the satisfaction score for Norelco and that for Remington is computed. The score differences (Norelco score – Remington score) are 15, –8, 32, 57, 20, 10, –18, –12, 60, 72, 38, –5, 16, 22, 34, 41, 12, –38, 16, –40, 75, 11, 2, 55, 10. Which model, if either, is statistically preferred over the other? How confident are you of your finding? Explain.
Answer to relevant QuestionsThe photography department of a fashion magazine needs to choose a camera. Of the two models the department is considering, one is made by Nikon and one by Minolta. The department contracts with an agency to determine if one ...A fashion industry analyst wants to prove that models featuring Liz Claiborne clothing earn on average more than models featuring clothes designed by Calvin Klein. For a given period of time, a random sample of 32 Liz ...As the U.S. economy cools down, investors look to emerging markets to offer growth opportunities. In China, investments have continued to grow. Suppose that a random sample of 15 investments in U.S. corporations had an ...Airline mergers cause many problems for the airline industry. One variable often quoted as a measure of an airline's efficiency is the percentage of on-time departures. Following the merger of Republic Airlines with ...Recently, Venezuela instituted a new accounting method for its oil revenues. Suppose that a random sample of 100 accounting transactions using the old method reveals 6 errors. Is there evidence of difference in method ...
Post your question