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In a survey of undergraduate library usage, it was found that 76% of seniors, 59% of juniors, 50% of sophomores, and 28% of freshmen use the library frequently. Suppose that 17% of the undergraduates are seniors while the corresponding percentages for juniors, sophomores, and freshmen are 18%, 19%, and 46% respectively.
What percent of the students use the library frequently?
Suppose you see a student use the library everyday. What is the probability that this student is a freshman?
what is the first big change that american drivers made due to higher gas prices? according to a survey 30 said that it
It is reported in USA Today that the average flight cost nationwide is $342.59. You have never paid close to that amount and you want to perform a hypothesis test that the true average is actually less than $342.59. What are the appropriate hypoth..
what is an example of a variable for which we would use a x2
In your own words, describe the concept of correlation, include the coefficient of correlation (r) and the coefficient of determination (r2) in your description.
What is the probability that the next 100 customers will spend an average of less than $56 on dinner?
ABC Convenient stores uses fixed-time period model to determine order quantity for their popular chewing gum (Supergum). Daily demand for Supergum is 100 units with a standard deviation of 25 units.
A data set of ordered pairs with a negative linear correlation has a coefficient of determination of 85.2%. What is the linear correlation coefficient?
determined from the test in Part (b) and test the homogeneity of the six response curves. State the conclusion of the test and give the model you have adopted at this stage.
on a psychology exam with m 76 and s 12 tom scored 9 points below the mean mary had a score of x 70 and bill had a
Find the confidence interval by estimating the population proportion
Joe has started an iphone booth in the mall. His francise booth and other startup costs total $82,000. Joe expects to pay $240 per iphone unit and sell them for $390 each. Joe needs to reach a 10% profit margin.
The random variables, X and Y, have a probability density function given by: By transformation of variables, find the probability density function of Z=X+Y.
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