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Meal replacement diets work by replacing one or two meals each day with low-calorie, nutrient-rich shakes and bars. A nutritionist claims that, on average, a
Meal replacement diets work by replacing one or two meals each day with low-calorie, nutrient-rich shakes and bars. A nutritionist claims that, on average, a new meal replacement diet program has increased the weight loss to at least 19 lbs, a big improvement over 10 lbs maximum of the previous version. An independent testing of 11 randomly selected patients showed that the sample mean weight loss is 17.42 lbs with a standard deviation of 1.62 lbs. Test the nutritionist's claim using a 0.025 significance level. Assume that the weight losses are approximately normally distributed as the histogram of the sample values is roughly symmetric and bell-shaped, so the Student t distribution is applicable for hypothesis testing. Round to 3 decimal places where appropriate. (a) State the null and alternative hypotheses, identify which one is the claim and type of the test. H 0 : Select an answer ? H 1 : Select an
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