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Politics. Students in an Intro Stats course were asked to describe their politics as "Liberal," "Moderate," or "Conservative." Here are the results:
a) What percent of the class is male?
b) What percent of the class considers themselves to be "Conservative"?
c) What percent of the males in the class consider themselves to be "Conservative"?
d) What percent of all students in the class are males who consider themselves to be "Conservative"?
Temperature in a certain city for the month of June follows a uniform distribution over the interval 61º F to 91º F. What is the probability that a randomly selected June day has a temperature that exceeds 70º F?
female undergraduates in randomized groups of 17 took part in a self-esteem study. the study measured an index of
Many classic movies revolve around the theme of individuals being transformed through contact with an organization. For example, the 1982 hit "An Officer and a Gentleman," is a story about a Naval Aviation School office-candidate,
Costs of Television: Listed below are prices (in dollars) and quality rating scores of rear-projection televisions. All of the televisions have screen sizes of 55 or 56 inches.
Demonstrate your understanding of choosing the type of regression model to the given data, by explaning three factors that should be taken into account in the choice between different models.
Following data represent concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Sample standard deviation is?
a sociologist found that in a sample of 50 retired men the average number of jobs they had during their lifetimes was
The mean is 75 and the standard deviation is 6. If 1200 students took the test, approx how many students would be expected to score between 69 and 81?
the central limit theorem can be used to analyze round-off error. suppose that the round-off error is represented as a
If X and Y are statistically independent random variables both with probability density function f(t)=e^(-t) I[0, +infinity](t) , where I is the indicator function of t. Find the probability density of the variable Z=Squareroot(Y/X).
as we have noted in previous chapters even a very small effect can be significant if the if the sample is large enough.
Mean operating cost for the fleet of delivery trucks because the sample mean is contained in the interval. Do you agree? How would you interpret this confidence interval?
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