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The paper "Prospective Randomized Trial of Low Saturated Fat, Low Cholesterol Diet During the First Three Years of Life" (Circulation [1996]: 1386-1393) describes an experiment in which "1062 infants were randomized to either the intervention or control group at 7 months of age. The families of the 540 intervention group children were counseled to reduce the child's intake of saturated fat and cholesterol but to ensure adequate energy intake. The control children consumed an unrestricted diet."
a. The researchers concluded that the blood cholesterol level was lower for children in the intervention group. Is it reasonable to conclude that the parental counseling and subsequent reduction in dietary fat and cholesterol are the cause of the reduction in blood cholesterol level? Explain why or why not.
b. Is it reasonable to generalize the results of this experiment to all children? Explain.
A particular medical operation proves fatal in 1% of the cases. Find an approximation to the probability that there will be at least 2 fatalities in 200 operations.
Calculate the 90% confidence interval for the population mean of health men's pulse (sphygmus) in mountainous area.
computing the probability values using normal distribution.the mean price of new homes from a sample of houses is
If the sides of a square are lengthened bt 5cm, the area becomes 169cm2. Find the length of a side of the original square.
What is the point estimate for the proportion of people preferring model B, write suitable null and alternative hypotheses in words and symbols for this problem.
suppose that you and a friend play a game with the following rules there is a green player and a blue player there are
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
A. What is the 90% confidence interval for the daily sales at all restaurants. B. What is the probability that the average sales are really $32,000 or more per day? Assume that the population average is $30,000 per day and the std. Deviation is $2..
in a study of 420006 cell phone users 164 subjects developed brain cancer. test the claim that cell phone users
Students revealed and average cost of books of $370 per student. The Dean of Students believes that cost are greater this semester. What is the test value for this hypothesis?
Based on responses from 1,015 randomly selected teens, which concluded that 44% of teens say grades are the greatest source of pressure, test the claim that fewer than half of all teens in the population feel that grades are the greatest source of..
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