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Stanford University (25pts.) In the city of Cincinnati there are two taxicab companies, the Yellow and the Orange. As you may suppose, the Yellow cabs are yellow and the Orange cabs are orange. The Yellow Compay operates 400 cabs in the city and the Orange Company operates 40 cabs. One dark evening, a pedestrian is killed by a hit-and-run taxicab. There was one witness to the accident. In court, the witness' ability to distinguish cab colors in the dark is questioned, so he is tested under conditions similar to those in which the accident occurred. When he is shown an orange cab, he says it is orange 95% of the time time and yellow 5% of the time. When he is shown a yellow cab, he says it is yellow 80% of the time and orange 20% of the time. The judge believes that the test accurately represents the witness performance at the time of the accident, so the probabilities he assign to the events of the accident agree with the frequencies reported by the test.
Flip the tree. Label all endpoints, supply all branch probabilities, and calculate and label an endpoint probabilities.
A candy confectioner measures the weight of 30 pieces of candy and obtains a mean and standard deviation of 32.5 gms and 2.6 gms, respectively. Construct the 98% confidence interval for the population mean.
Please use the regression procedure within Excel under Tools > Data Analysis to construct this equation.
A study was recently done in which 500 people were asked to point out their choices for one of three products. Following table illustrates the breakdown of responses by gender of the respondents.
One measure of the overall sampling error in the entire distribution of sample means is the
A researcher uses hypothesis test to estimate H0 µ= 80. Which combination of factors is most probable to result in rejecting null hypothesis?
The City Transit Authority plans to hire 8 new bus drivers. From the group of 100 qualified applicants, of whom 55 are men and 45 are women, 8 names are to be selected by lot. Suppose that Mary and John Lewis are among the 100 qualified applicants..
The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes.
A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.8 hours.
At a college, 70 percent of the students are women and 35 percent of students receive grade of C. About 20 percent of students are neither female nor C students. Use this contingency table.
An assumption for a significance test of the correlation coefficient is that the populations, the variance of each variable is the same at each point of the other variable.
Use Chebyshev's theorem to find what percent of the values will fall between 120 and 150 for a data set with mean of 135 and standard deviation of 7.5.
Find a 99% confidence interval estimate of the proportion of people who say that they voted.
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