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The mean finish time for yearly amateur auto race was 187.23 minutes with a standard deviation of 0.363 minute. The winning car, driven by Alex, finished in 186.07 minutes. The previous year's race had a mean finishing time of 111.5 with a standard deviation of 0.142 minute. The winning car that year, driven by Kate, finished in 111.25 minutes. Find their respective z-scores. Who had the more convincing victory?
Is there any evidence to suggest the true proportion of residents who favor additional power to tap phones is less than 0.75? Use a = 0.01.
Assume that the weight of fish for both lakesare normally distributed with equal population standard deviations. Test at =.01 significance level,if the mean weights of fish are different for these two lakes
Describe these distributions by writing a few sentences comparing the duration of hospitalization for men and women.- Can you suggest a reason for the peak in women's length of stay?
In effect, she wanted to determine if there was a relationship between FCAT Science Standardized score and FCAT Reading Standardized score.
How would I calculate estimates of L, Lq, W, Wq and probability that there is no customer in the system? How would I calculate L, Lq, W, Wq and probability there is no voter in the system with 2 customer service representatives?
A sample of 400 observations taken from a population produced a sample mean equal to 92.45 and a standard deviation equal to 12.20.
Five fair dice were tossed, and the sum of the resulting tosses was recorded. This process was repeated 10,000 times using a computer simulation.
Determine the test value? Use α = 0.05. (Use the variances unequal formula).
Definition and Concepts of modern business statistics? What is the scope of business statistics. key terms and elements of business statistics?
express each of the following extended sums in the appropriate summation
If you currently own 6,000 shares of stock in the company and decide not to participate in the rights offering, how much money can you get by selling your right
Joe collected a questionnaire from 28 students in his school on their attitudes toward the local science fair. Joe wanted to test the following null hypothesis:
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