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Question: Find an example of a randomized experiment in the news. Answer the following questions about it. Be sure to include the news article with your response.
a. What are the explanatory and response variables? What relationship was found, if any?
b. What treatments were assigned? Was a control group or placebo used?
c. Was the study a matched-pair design, a block design, or neither? Explain.
d. Was the study single-blind, double-blind, or neither? Explain.
Convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
The sample mean of the accounts is found to be y-bar = $94.22, and the sample variance is equal to $455.21. Estimate mu and place a bound on the error of estimation.
Is contamination with the two kinds of bacteria disjoint? Explain. (c) Is contamination with the two kinds of bacteria independent? Explain.
Develop the opportunitiy loss table and compute the expected opportunity loss for each product. Determine how much the firm would be willing to pay to a market research firm to gain better information about future market conditions.
A 95% confidence interval for µ is found to be 652 ± 21.56 = ($630.44, $673.56). Determine which of the following statements is true.
a manufacturer of clothing knows that the probability of snap flaws is 0.005. an inspector examines 50 shirts in an
Problem: Do heavier people burn more energy? We have data on the lean body mass and resting metabolic rate for 12 women who are subjects in a study of dieting. Lean body mass, given in kilograms, is a person's weight leaving out all fat. Metabolic..
if the correlation between two variables is known to be statistically significant at the 0.05 level then the regression
Suppose that a mortality table used to calculate reserves is altered. Explain how the reserves will be affected, for whole life policies with a constant death benefit and level premiums.
three people are randomly selected from voter registration to report for jury duty. the gendermale or female of each
a screeding test which measures the level of a prostate specic antigen psa is a commonly used tool for the detection of
A person claims to be able to predict the outcome of flipping a coin. This person is correct 16/25 times. Compute the 95% confidence interval on the proportion of times this person can predict coin flips correctly.
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