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Construct a 96% confidence interval for the true mean breaking strength of a certain type of 10 ft. long cables. Assume that there are 100 such cables with mean X ? = 457 lbs while the standard deviation of the population, ? = 50 lbs. Also find the Margin of error for the interval estimate.
Your company asks you to compare a new advertising campaign and the old one. Sample data on the accounts as follows:
The time (in minutes) between telephone calls at an insurance claims office has the exponential probability distribution f(x) = 0.50 e-0.50x for x ≥ 0. What is the mean time between phone calls.
EBook is a digital book provider that sells their downloaded product through both Anason and Bairnes-Nolb. Anason requires that EBook use a different format than they use for Bairnes-Nolb.
identify the circumstances in which the median rather than the mean is the preferred measure of central
Using one proportion z test to find whether or not to support the claim - There is little evidence to reject H 0 , therefore they conclude the tvs are 20 pounds on average.
If a student scored 90 points on a test where the mean score was 82.2 and the standard deviation was 5.7. What steps do I do to find out the student's z score?
Find the 95% confidence interval of the mean score for all golfers if this is a sample of 110 golfers instead of a sample of 93.
Pollsters attempt to find out whether or not person is a "likely voter" before they count their opinion in poll. If we suppose 40% of registered voters will really vote.
question in a certain state license plates have three letters followed by three digits. there can be no repetition of
Calculate a 3-period moving average for period 7. Compute the MAD of the forecast.
suppose x and y have joint density fxy 10x2y when 0 lt y lt x lt 1.a find the marginal densities of x and y and theb
random number generation based on discretenbsp distribution.first american bank is trying to determine whether it
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