Is the Diet Practical?  When 40 people used the Weight Watchers diet for one year, their mean weight loss was 3.0 lb and the standard deviation was 4.9 lb (based on data from “Comparison of the Atkins, Ornish, Weight Watchers, and Zone Diets for Weight Loss and Heart Disease Reduction, ” by Dansinger et al., Journal of the American Medical Association, Vol. 293, No. 1). Use a 0.01 significance level to test the claim that the mean weight loss is greater than 0. Based on these results, does the diet appear to be effective? Does the diet appear to have practical significance?

Question

Is the Diet Practical?  When 40 people used the Weight Watchers diet for one year, their mean weight loss was 3.0 lb and the standard deviation was 4.9 lb (based on data from “Comparison of the Atkins, Ornish, Weight Watchers, and Zone Diets for Weight Loss and Heart Disease Reduction, ” by Dansinger et al., Journal of the American Medical Association, Vol. 293, No. 1). Use a 0.01 significance level to test the claim that the mean weight loss is greater than 0. Based on these results, does the diet appear to be effective? Does the diet appear to have practical significance?

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Hypothesis Testing

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: Bakery Products. TheMill Avenue Bakery packages its products in three sizes: one-half-pound, one-pou...

A: From the given information,Consider, x1 denote the number of one-half-pound packages, x2 the number ...

Q: What is a confidence-interval estimate of a parameter? Why is such an estimate superior to a point e...

A: Confidence Interval:Confidence interval is the interval estimate of the population parameter. It is ...

Q: In each of Exercises, we have given the P-value for a hypothesis test. For each exercise, refer to T...

A: Decision criterion:If the p-value of the test is less than or equal to the level of significance, re...

Q: The following table shows the results of a two-factor analysis of variance with two levels of factor...

A: Consider a two-factor analysis with two levels of factor A, three levels of factor B, and a separate...

Q: Could you help me solve and understand d-f?

A: d.The required value is calculated as follows:

Q: Composite Sampling for Diabetes Currently, the rate for new cases of diabetes in a year is 3.4 per 1...

A: Here, new case of diabetes rate is 3.4 per 1000 and there are ten people having diabetes then the di...

Q: In Exercises, X denotes a binomial random variable with parameters n and p. For each exercise, indic...

A: Continuity correction:The binomial probability is converted to a normal distribution probability by ...

Q: A variable of a population is normally distributed with mean µ and standard deviation σ. a. Identify...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: In each of Exercises, we provide a sample mean, sample size, sample standard deviation, and confiden...

A: a) Givensample mean = xbar =20sample size = n =36sample standard deviation = s = 3confidence interva...