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A researcher is testing a possible carcinogen on mice. He chooses 8 mice at random from a batch of 13 mice. Unknown to him, 6 of the mice already have cancers. What is the probability that there are 2 cancerous mice in the group he has chosen?
A random sample of 11 health maintenance organizations (HMOs) was selected. For each HMO, the co-payment (in dollars) for a doctor's office visit was recorded. The results are as follows:
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
a primatologist believes that rhesus monkeys possess curiosity. she reasons that if this is true then they should
Find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community.
Where does the p-value come from for the spatial scan statistic used in SaTScan? Explain how Monte Carlo simulation is used to derive a p-value for a cluster.
The results are shown below. Research question: Are the mean waiting times the same for emergency patients in these four hospitals? Use 0.05 for the significance level in making your decision.
How many participants must be enrolled in the study? Assume that the standard deviation of total cholesterol is 18.5.
1.using your own words what is statistical variability? why is it important for researchers to understand the
Find the probability of drawing either a king or a spade in a single draw from a pack of 52 playing cards.
Suppose that students in a particular school are all very competent. For each individual, the probability that they will pass the proficiency exam (independent of thier classmates) is 0.99
Tthe sticks in the shipment fail to meet specifications. What is the probability that no more than 3 will be defective? What is the probably that more than 5 will be defective?
Statistically significant differences (α ≥ 0.05) between the benefits of behavioral therapy and psychoanalysis when treating an eating disorder were found.
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