Question

"Tarzan lights, Inc" claims that its compact fluorescent bulbs average no more than 3.50 mg of mercury. A sample of 25 bulbs shows a mean of 3.59 mg of mercury. As the company's statistician, you are worried that the lot may be defective for having too much mercury. Assume a known population standard deviation of 0.18, the population has a normal distribution, and a = .01. What kind of test should be done here? Seleccione una: O a. binomial test b. chi-square test O c. t test O d. z test

Answer 1

Assuming the population is normally distrbuted; also as the population sd is given, we will sue z test

ANS : z test