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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.
Analyze whether the factors of totwrk, educ, and age are enough factors to explain the variation in sleep. Explain which additional factors should be explored in order to explain the variation in sleep. Provide your reasoning.
for each of the following combinations of values decide whether the combination is possible or impossible and if its
what is the probability that the company makes a profit - calculate the probability that the average weight per sack in a batch, is less than 20 kg.
Happy Hector and Party Paul are each having a catered party at Fun Factory. Hector's party is in the hall and Paul's party is on the Patio.
let s be the event that a randomly chosen male age 18-24 is republican. let c be the event that a randomly chosen male
Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced.
Estimate a probability that a seed from new plant will germinate a random sample of 3000 seeds, of those seeds 2430 germinated. What is the sample space for this problem and does it add up tp 1? are the outcome in the sample space equally likely?
Leading product are falling leading to declining revenues. Draft a research proposal for the client based on a scientific methodology.
Find the appropriate critical statistic for : A one tailed test in the positive direction with 15 observations with alpha equal to 0.001.
Does the data indicate, at the significance level 0.05, that true mean lifespan of the product is less than that of the claimed average lifespan? Select the Alternative Hypothesis, Value of the Test Statistic.
Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 69 and 89?
A t-distribution to create 90% confidence interval for population mean. If convenient, use technology to create the confidence interval.
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