A random sample of 450 shoppers at Quincy Mall found that 150 favored longer shopping hours. Is this sufficient evidence to conclude that less than 30% of the shoppers at Quincy Mall favor longer hours? Let a= 0.05 Give the null and alternative hypothesis, the critical value, the test value and your conclusion as your answer.
Reginald Brown, an inspector from the Department of Weights and Measures, weighs 15 eighteen-ounce cereal boxes of corn flakes. He finds their mean weight to be 17.78 ounces with a standard deviation of 0.4 ounces. Are the cereal boxes lighter than they should be? Let a= 0.01 Give the null and alternative hypothesis, the critical value, the test value, and your conclusion as your answer.