Question

An average computer mouse inspector can inspect 55 mice per hour with a population standard deviation of 8 mice per hour. the 40 computer mice inspectors at a particular factory can only inspect 50 mice per hour. does the company have reason to believe that these inspectors are slower than average at α = 0.10?

Answer 1

Calculating the z score using the given data results in a value of -11.18034. The p-value is 0. The result is significant at p <0.01. Therefore at a 90% confidence level, the company has sufficient reason to believe that these inspectors are slower than average.