Follow the traditional steps in the TEST OF HYPOTHESIS AND ANOVA. Do not use the p-value technique

A package delivery service claims that that it takes an average of 20 hours or less to send the package from Manila to Cebu. An independent consumer agency is doing a study to test the truth of this claim. Several complaints had led the agency to suspect that the delivery time is longer than 20 hours. In a sample of 25 trials. the average time was 21 hours and std. deviation of 1.5 hours. Should you believe the claim? Use 0.01 level of signicance 12 Oz" jar of a local brand of peanut is less than this value. The Better Business bureau selected a sample of 25 jars. The sample showed an average net weight of 11.90 ounces and a standard deviation of 0.4 ounce. Using a 0.01 level of significance, what would the Bureau conclude about the operation of the local firm?A car is advertised as having a gas mileage rating of at least 30 miles per gallon. If the miles per gallon of 10 independent experiments are 26, 24, 20, 25, 27, 28, 30, 26 33, 34, should you believe the advertisement? Use 0.01 level of significance