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Six people suffering from weight problems are put on a year-long exercise regimen, and their weights before and afterwards are compared. The average weight loss was 16.7 lbs., with a sample standard deviation of 25.4. Do these results support the claim at the 10% significance level that the exercise regimen results in weight loss?
the manager of a manufacturing company believes that experience is the most valuable variable in determining a workers
the average on an exam is 75 and the standard deviation is 17. if the instructor assigned grades based on the normal
use the poisson model to approximate the probability. round your answer to four decimal places. 32the probability that
How large a sample size will need to be selected if we wish to have a 99% confidence interval with a margin for error of .25 hours?
Which of the statements about line-balancing is true and if a precedence relationship exists between tasks A and B, they cannot be assigned to the same work station.
A mean of 400 labour hours and a standard deviation of 100 labour hours. What is the probability that the bridge gets constructed between 350 and 450 hours?
A company has two different processes that make credit cards. Suspecting that machine B has a higher variability than machine A the manager orders a test to be run. The following data was collected:
Assume that a random variable, x, is distributed according to a normal distribution with mean 46 and standard deviation 12. (a) What is the standard error of the estimate, x-bar, if a sample of size 25 is taken?
some types of periodicals are often browsed on the shelves but seldom purchased. a popular home improvement magazine
a lawyer researched the average number of years served by 45 different justices on the supreme court. the average
the newton-pepys problem assume the following problem only involves fair six-sided dice.a calculate the probability
on average there is one flaw per 1000 feet of pipe. what is the probability that there is exactly one flaw in only
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