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Researchers studied the effects of adding an exercise program to dieting in the achievement of weight loss. A sample of 45 men ages 18-20 (Group 1) were observed for weight loss using a diet only, and another independent sample of 52 men ages 18-20 (Group 2) were put on the same diet, but with an added exercise program. The mean weight loss for Group 1 was 8.8 pounds with a standard deviation of 4.1 pounds, and the mean weight loss for Group 2 was 16.9 pounds, with a standard deviation of 4.1 pounds. Calculate the upper bound of a 99% confidence interval for the difference in mean weight loss for the two groups.
suppose that the proportion of colorblind people in a certain population is .008 . what is the probability that there
suppose a geyser has a mean time betwen eruptions of 83 minutes. let the interval of time between the erupitons be
the standard error from a given population is one. if you draw a sample from this population and estimate the standard
a light fixture contains 2 light bulbs. the lifetime xi of each bulb is exponentially distributed with a mean of 200
the number of deaths due to firearms in the united states between 1968 and 1993 are given belowyearfirearm deaths
q1. one hundred policyholders file claims with stressfree insurance. ten of these claims are fraudulent. claims manager
which of the following is a valid objective function for a linear programming problem?none of the answers are validmin
The last sample showed a mean and standard deviation of 3.55 and 0.08 inches, respectively. Using α = 0.05, the appropriate decision is?
parts manufactured by an injection molding process are subjected to a compressive strength test. twenty samples of
Flying over the western states with mountainous terrain in a small aircraft is 40% riskier than flying over similar distances in flatter portions of the nation. Find the probability of no accidents in 100,000 flight operations.
In a large metropolitan area, past records revealed that 30 percent of all the high school graduates go to college. Each student's choice to go to college is independent. From 20 graduates selected at random, what is the probability that exactly 8 wi..
Suppose that x is normally distributed with a mean of 50 and a standard deviation of 15. What is P(34.55 ≤ x ≤ 72.95)?
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