Testing Hypothesis. Assume a simple rando sample has been selected froma normally distributed population and test the given claim.Use the traditional method or P-value method for testing hypothesis. Identify the null and alternative hypothesis, test statistics, p-value(or range of P-value), critical value(s), and state the final conclusion that address the original claim.
Is the Diet Practical? When 40 people used the Weight Wathcers diet for one year, their mean weight loss was 3.0 lb and the standard deviation was 4.9 lb. Use a 0.01 significance level to test the claim that the mean weight los is greater than 0 lb. Based on these results, does the diet appear to have practical significance?