Question description
It has been claimed that the mean weight of individual boxes of a type of cereal is 16 ounces. A grocery manager does not believe the claim and collects a sample of 50 boxes. A sample mean of 15.8 ounces results. Test at significance level 0.05 the null hypothesis that the population mean weight is 16 ounces against the alternative that it is not equal to 16 ounces. Let the population variance be equal to 2.5 ounces2. Make a decision about the validity of the claim using both the critical value as well as the p-value criterion.
Step 1: Homework help – Write the null & alternative hypotheses (4 pts.)
Step 2: Homework help – Write the significance level of the test (1 pt.)
Step 3: write the appropriate test-statistic
Step 4: Find the calculated value of the test-statistic or plug & chug Step 5-1: Find and write the critical value of the test
Step 6-1: Homework help – Write your decision about this test.
Step 5-2: Homework help – Write the formula for the p-value and then calculate the p-value of the test
Step 6-2 Make a decision using the p-value criterion and announce that decision
