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A turbine blade has demonstrated a Weibull failure pattern with a decreasing failure rate characterized by a shape parameter of 0.6 and a scale parameter of 8-- hr.
(a) Compute its reliability for a 100-hr mission
(b) If there is a 200-burn-in of the blades, what is the reliability for a 100-hr mission?
why would we use a matched-pairs design and what is an example where this would
Suppose that a random sample of 51 passengers showed an average total weight of 200 pounds with a sample standard deviation of 59.5 pounds. What is the value of the test statistic?
the cost of a college education has increased at a much faster rate than costs in general over the past twenty years.
Construct the 90% and 99% confidence interval for population mean. Which interval is wider? If convenient, utilize technology to construct confidence intervals.
During normal business hours on the east coast, calls to the toll-free reservation number of the Nite Time Inn that the numb roy calls per minute can be described by the Poisson distribution.
Using Non-parametric test, whether there is significant difference in the motor coordination skills.
question assume the branch manager requested estimates of the mean selling price of gulf view condominiums with a
10 independent measurements were made of the pH level for both solutions, with the following data testing. Do the data disprove the scientist's claim? Use the 5% level of significance. What is the p-value?
Can students save money by buying their textbooks at Amazon.com? To investigate this possibility, a random sample of 15 textbooks used during the Spring 2007 semester at Iowa State was selected.
"Determine if the statement is a typical null hypothesis (Ho) or alternative hypothesis (Ha). The average price of a particular statistics textbook over the Internet is the same as the average price of the textbook sold at all bookstores in a coll..
estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution. a
At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
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