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Glucose level in patients free of diabetes are assumed to follow a normal distribution with a mean of 120 and a standard deviation of 16. What is the probability that the mean glucose levels exceeds 115 in a sample of 12 patients.
The Dept. of Labor has reported that 30% of the 2.1 million mathematical and computer scientists in the United States are women. If 3 individuals are randomly selected from this occupational group
Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 8 at the 0.05 level of significance?
A researcher selects a random example of college students and measures number of hours they spend watching television per week and their grade point average.
A multicenter clinical trial involving 17,000 patients suspected of having acute myocardial infarction was conducted. The vascular death rate after 5 weeks was compared in patients receiving aspirin versus those not receiving aspirin
Explain in your own words (no direct quotes, please) what it means when there is an interaction between two factors.
The winning team's scores in 7 high school basketball games were recorded. If the sample mean is 10.3 points and the sample standard deviation is 0.10 points,
A grab bag comprises 11 $1 prizes, 7 $5 prizes, and 2 $20 prizes. Three prizes are selected at random. Determine the probability which exactly two $20 prizes are chosen?
Maria Gomez, a research analyst in the state department of health, has undertaken a study of the possible consequences of overbuilding hospital facilities.
Find the value of x that corresponds to each of these standard scores z = -1.85.
There are infinitely many primes of the form n^2 - 1. Please list at least 4 of these primes. (I hope it is just as easy as I think, but is there any work to this?)
Identify the scale of measurement in each of the following:
At the .01 significance level, can she conclude that there is a difference between how well the different tutorials work for the students?
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