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The Bureau of the Census reports that the average commuting time for citizens of both Baltimore, Maryland, and Miami, Florida is approximately 29 minutes (uMiami=29 and uBaltimore=29 minutes). To see if their commuting times appear to be any different in the winter, random samples of 40 drivers were surveyed in each city and the average commuting time for the month of January was calculated for both cities. The results are provided below. At the 0.05 level of significance, can it be concluded times are different in the winter? Miami Baltimore Sample size 40 40 Sample mean 28.5 mins 35.2 mins Population Standard deviation 7.2 mins 9.1 mins.
Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
Use the least-squares method to compute the regression of coefficients b0 and b1.
Illustrate the maximum number of reservations that it could accept for a flight with a capacity of 160, if it needs the probability of accommodating all reservation holders to be at least 95%.
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Which is the probability of that the median of the sample or average medians be between 320 and 350 minutes?
Testing for two Proportions - Is the difference between the averages statistically significant?
Perform the appropriate test for a difference in mean blood glucose and report the p-value for the two-tailed test of significance, assuming that the variances are equal.
Determine the probably of selecting a female or an accounting major? Which rule of addition did you apply?
One person's file is chosen at random. Find out probability that selected person will fall into following categories. Book keeping.
Compute the mean and standard deviation of the scores and use these for the calculations below. Show your calculations on the back of his page.
Which of the following is true about the expected value of perfect information. It is the amount you would pay for any sample study.
Machine X test unit cost $3000 with beta=3 and theta=500, Machine Y test unit cost $2000 with beta=3 and theta=400. If the machines oil fixtures has life of 20 hrs, which machine goes to market first?
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