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In 2003, Major League Baseball took steps to speed up the paly of baseball games and make games a more consistent duration. In a sample of 44 games in 2002, the average duration of a game was 2 hours and 58 minutes with a standard deviation of 29 minutes. A similar survey in 2003 of 60 games found that the average duration was 2 hours and 40 minutes with a standard deviation of 17 minutes. When testing the hypothesis (at the 5% level of significance) that the variance has been reduced, what is the test statistic? (please round your answer to 2 decimal places)
Determine a 90% confidence interval on difference in mean number of production units for two shifts. Compute 99% confidence interval for part A.
if the endpoints of a confidence interval for the difference between a pair of treatment means are both positive
A manufacturer claims that the life span of its tires is 51,000 miles. Assuming the manufacturer's claim is correct, what is the probability the mean of the sample is 50767 miles or less?
assume that we have a random sample of size n from a nmu1 distribution. we want to testhsubo mu2hsub1 mu1use the neyman
For a particular drug being investigated, you find that for n = 9 women, the sample mean is X¯ = 85 and the sample variance is s 2 = 160.78. Estimate the standard error of the sample mean assuming random sampling.
Using Web or Library resources research to find the years of introduction and the processor speeds for both the CPU A and the CPU B. Be sure to cite your creditable resources for these answers. Convert the years introduced to correct values of t a..
Why was it important to randomize in deciding who would exercise?- What would be the advantages and disadvantages of using 100 subjects instead of 40?
Pprobability is no greater than 1% that the day's supply is exhausted. How many pounds of ground beef should the manager have available for use each day?
Based on your analysis, how is the new bottling process working?
Two samples of 150 cars (sample A) and 250 cars (sample B) were taken to test for the defective component. Which of the following statements must be true:
Build a predictive model for number of calories using fat grams. If a pizza has 15 grams of fat, how many calories should it have, using your model?
Cardio-Pulmonary Resuscitation (CPR). In 180 days of school, about how many days can we expect that the teacher on bus duty will likely be certified in CPR?
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