Math Solutions

(See Steps) A random sample of 100 of a certain popular car model last year found that 20 had a certain minor defect in the brakes. The car company made

Question: A random sample of 100 of a certain popular car model last year found that 20 had a certain minor defect in the brakes. The car company made an adjustment in the production process to try to reduce the proportion of cars with the brake problem. A random sample of 350 of this year’s model found that 50 had the minor brake defect.

  1. Was the company’s adjustment successful? Carry out an appropriate test to support your answers.
  2. Describe a Type I error and a Type II error in this setting and give a possible consequence for each

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