Mathematics, 23.04.2021 16:30, 19jcormier
An experiment will be conducted to test the efficacy of a weight loss supplement. Volunteers will be randomly assigned to take either the supplement or a placebo for 90 days, with 12 volunteers in each group. The subjects will not know which treatment they receive. At the end of the experiment, researchers plan to calculate the mean weight loss for each of the two groups and to construct a Welch's two-sample t-confidence interval for the difference of the two treatment means. Choose whether each of the following assumptions are necessary for the confidence interval to be valid.
a. The sample sizes must be equal
b. The population standard deviations must be unequal
c. The distribution of weight loss of the two treatments are approximately normally distributed
d. The volunteers in the supplement group are paired with volunteers in the placebo group
e. The expected number of people who lose weight in each group is at least
Answers: 1
Mathematics, 21.06.2019 15:30, makaylapink8167
The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.
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Mathematics, 21.06.2019 22:30, jordan7626
Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.
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Mathematics, 22.06.2019 02:30, lauren21bunch
The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?
Answers: 1
An experiment will be conducted to test the efficacy of a weight loss supplement. Volunteers will be...
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