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Suppose the total distance travelled by a car (in thousands of kilometres) before it would need to be scrapped is an exponential random variable with parameter 1/200. Smith has a used car that he claims has been driven only 100,000 kilometres.
If Susan purchases the car, what is the probability that she would get at least 200,000 additional kilometres out of it?
Determine the probability that a randomly selected person has a birthday on the 1st day of a month. Interpret this probability. Determine the probability that a randomly selected person has a birthday on the 31st day of a month. Interpret this proba..
Under what conditions should you use the Chi-Square Test to determine whether there is a difference between proportions of two independent populations?
Find the critical value of F for the following. Round to two decimal places.
Comment briefly on the difference in answers between part d and part e. What important assumption regarding independence makes these answers different? Which assumption do you think is more realistic? Why?
the total claim amount for a health insurance policy follows a distribution with density function fx 11000e-x1000 for
1. If X = 2 and Y = 3, the constraint 2 X + 8 Y
The following contingency table shows representative data for the city of Boston, cross-classified by race and type of interest rate received:
What is multicollinearity, and how can it adversely affect multiple regression analysis? How can we tell whether multicollinearity is present?
Find the median amount of time you would have to wait for the 10th email to appear.
Assuming that the population standard deviations are the same, perform a two independent samples t-test on the hypotheses Null Hypothesis: μ1 = μ2, Alternative Hypothesis: μ1 ≠ μ2. What is the test statistic and p-value of this test?
In a different regression analysis, 40% of the variance was explained. The sum of squares total is 1000. What is the sum of squares of the predicted values?
Scatterplot. Plot the weight of the bar of soap against day. Is the overall pattern roughly straight-line? Based on your scatterplot.
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