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The dot plots should show some separation of the two groups. Second, try a simple univariate logistic-regression using the binary variable as the Y variable with each individual predictor. Third, although it seems odd to do so, convert the binary response variable to a 0/1 continuous response and try some of the standard smoothing methods, such a spline fit to investigate the general form of the response. Does it look logistic? Are quadratic terms needed?
Suppose that = $7600, is there adequate evidence to conclude that mean annual wage of people from this county is signicantly dierent than state mean?
A chi-square test for goodness of fit is used to test whether or not there are any preferences among 3 brands of cola.
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
Suppose that X represents diameter measurements from a gamma distribution with a mean of 3 mm and a variance of 1.5 mm^2.
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
A film alliance used a random sample of 50 U.S. citizens to estimate that the typical American spent 78 hours watching videos and DVDs last year. The standard deviation of this sample was 9 hours.
Find the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
To check this theory, 20 invoices are randomly selected and 5 are found to have errors. What is the probability that of the 20 invoices written, five or more would contain errors if the theory is valid?
If you take a random sample of 100 adults, what's the probability that less than 50% of the adults sampled prefer coffee? Write answer in decimals using 4 digits precision.
What are the theoretical parameters for the sampling distribution based on these 40 trains? Assume you are dealing with an infinite population of trains.
Suppose you had flipped a fair coin 19 times and "tails" had come up each time. The probability of now tossing a "head" on the 20th flip would then be:
The adult books 20 are nonfiction and of the children's books 103 are nonfiction.if a book is selected at random, find the probability that it will be fiction.
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