Applied Statistics in Business and Economics
Applied Statistics in Business and Economics
5th Edition
ISBN: 9780077837303
Author: David Doane, Lori Seward Senior Instructor of Operations Management
Publisher: McGraw-Hill Education
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Chapter 1.3, Problem 1SE

Give an example of how statistics might be useful to the person in the scenario.

  1. a. An auditor is looking for inflated broker commissions in stock transactions.
  2. b. An industrial marketer is representing her firm’s compact, new low-power OLED screens to the military.
  3. c. A plant manager is studying absenteeism at vehicle assembly plants in three states.
  4. d. An automotive purchasing agent is comparing defect rates in steel shipments from three vendors of steel.
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A poll before the elections showed that in a given sample 79% of people vote for candidate C. How many people should be interviewed so that the pollsters can be 99% sure that from 75% to 83% of the population will vote for candidate C? Round your answer to the whole number.
Suppose a random sample of 459 married couples found that 307 had two or more personality preferences in common. In another random sample of 471 married couples, it was found that only 31 had no preferences in common. Let p1 be the population proportion of all married couples who have two or more personality preferences in common. Let p2 be the population proportion of all married couples who have no personality preferences in common. Find a95% confidence interval for . Round your answer to three decimal places.
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Applied Statistics in Business and Economics

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