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A hospital director believes that more than 32% of the lab reports contain errors and feels an audit is required. A sample of 200 tubes found 74 errors. Is there sufficient evidence at the 0.05 level to substantiate the hospital director's claim?
State the null and alternative hypotheses for the above scenario.
It is important for a woman to know if she is pregnant so that she can discontinue any activities, medications, exposure to toxins at work, smoking, or alcohol consumption that could be potentially harmful to the baby.
Mutual funds reported strong earnings in the first quarter of 2006. Especially strong growth occurred in mutual funds consisting of companies focusing on Latin.
the state education department requires local school districts to keep these records on all students age race or
Estimate the standard error of the proportion of defective parts and construct the 99% confidence interval for the proportion of defective parts.
if 70 percent of the population of a large community is in favor of a proposed rise in school taxes using the normal
What linear transformation will change sixth grade scores x into new scores xnew= a+bx that have the desired mean and standard deviation?
based on available information lead time demand for cd rom drives averages 250 units normally distributed with a
What are the four levels of measurement scales? Give examples of each and explain in detail. Explain the use of normal probability plot to evaluate whether a set of data is normally distributed? Please discuss in detail.
Determines the sample mean outer diameter to be 1.002 inches with a standard deviation of 0.003 inch. Calculate the process capability index for this example.
Use the given degree of confidence and sample data to find the margin of error in estimating the population mean. Replacement times for washing machines 90% confidence; n =41 the sample mean (x-bar) =10.9 years s=2.3 years
In this problem we want to run a test of goodness of fit to check whether the coats in the consignment follow the indicated probabilities.
an examination of rejects shows at least 7 problems. a frequency tally of the problems follows. construct a pareto
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