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A randomized trial tested the effectiveness of diets on adults. Among 40 subjects using the Weight Watchers diet, the mean weight loss after one year was 3.0 lb with a standard deviation of 4.9 lb. Among 40 subjects using the Atkins diet, the mean weight loss after one year was 2.3 lb with a standard deviation of 4.8 lb.
a. Construct a 95% confidence interval estimate of the difference between the population means. Does there appear to be a difference in the effectiveness of the two diets?
b. Use a 5% significance level to test the claim that there appears to be a difference in the effectiveness of the two diets.
Prepare in general journal form the entry necessary to correct the books for the transaction in part 1 of this problem, assuming that the books have not been closed for the current year and evaluate the net income to be reported each year 2007 thr..
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Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
What is the probability that a randomly chosen eight-week old baby smiles between 2 and 18 seconds?
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
Find the critical F value for the Following,
Researchers are studying the absorption of two drugs into the bloodstream. Each drug is to be injected at three dosages. There are 24 people in the study, and they are randomly divided into six groups.
Five test vehicles of each kind were crashed, with results given below. Research question: Are mean crash damages the same for these 3 vehicles?
Beta and required rate of return stock has required return of 11%; risk-free rate is 7%t; and market risk premium is 4 %. Determine the stock's beta?
At 0.05 level of significance, is there evidence of noteworthy difference in variation in sales among different aisle locations?
Questions based on binomial distribution, variance of the binomial distribution, discrete random variable and continuous random variables.
The Price-to-Earnings ratio (P/E) of a publicly listed profit-making company is defined as the ratio of the stock price of the company to the earnings per share.
Compute the probability of exactly 0,1,2,3,4, and 5 arrivals per day.
Use empirical Rule to evaluate proportion of costs within 2 standards deviations of mean. Write down these limits.
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