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In the past few years, the traffic problems in Lynn McKell's hometown have gotten worse. Now, Broad Street is congested about half the time. The normal travel time to work for Lynn is only l5 minutes when Broad Street is used and there is no congestion. With congestion, however, it takes Lynn 40 minutes to get to work. I f Lynn decides to take the expressway, it will take 30 minutes regardless of the traffic conditions. Lynn's utility for travel time is: U(15 minutes) = 0.9, U(30 minutes) = 0.7, and U(40 minutes) = 0.2.
(a) Which route will minimize Lynn's expected travel time?(b) Which route will maximize Lynn's utility?(c) When it comes to travel time, is Lynn a risk seeker or a risk avoider?
An alcohol awareness task force at Big-Ten university sampled 20 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying
A statistics instructor collected data on the time it takes the students to complete a test. The test taking time is uniformly distributed within a range of 35 minutes to 55 minutes.
The following table gives the median incomes of families by level of income and geographical region.
Solve by completing the square: Solve using the square root property:
Which of the following would be the hypothesis for testing the claim that the proportion of students at a large university who smoke is significantly different from 0.15?
The standard deviation of the population weight losses is about 10 pounds. How large a sample should he take to estimate the mean weight loss to within 2 pounds, with 95% confidence?
The concentration of glucose(mg/dl) for all samples was measured on one run of a spectrophotometer 1. give the statistical model and full explain each component.
A clinical investigator is interested in understanding the relationship between demographic factors and congestive heart failure, measured by a cardiac index (CI).
(a) Find the median cost of houses at Coal City in 1988. (b) Find the modal selling price of houses at Coal City in 1988.
A two tailed test is conducted at 5% significance level what is the P-value required to reject the null hypothesis.
Find the average cost of a loaf of bread in your area and compute the cost per day for one year. (Remember that average is the mean, median, mode, and midrange, but choose the best for the data.) 1. What measures of central tendency did you use?
One approach for defining elevated blood pressure is to use 90 mm Hg- the standard for elevated adult DBP- as the cutoff. What percentage of 17-year-old-boys would be found to have elevated blood pressure, using this approach?
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