(a) State the null and alternative hypotheses and (b) state whether the test of hypothesis will be a two-tailed test, a right-tailed test, or a left-tailed test.
A random check of 500 batteries manufactured by a company found 15 defective batteries. Quality control guidelines established by the manufacturer require that the proportion of all batteries manufactured by the company that are defective must be less than 0.05. With regard to quality control guidelines, will the manufacturer be satisfied with the results of a test of hypothesis based on the sample data?