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Salaries of 40 college graduates who took a statistics course in college have a mean of $62, 200. Assuming a standard deviation of $11,766 construct a 90% confidence interval for estimating the population mean.
evaluate completely the following statement the issue is not whether there is variation but whether the variation is
a chemical engineer is interested in determining whether a 1 certain trace impurity is present in a product. an
A sample of 140 golfers showed that their average score on a particular golf course was 93.38 with a standard deviation of 4.36. Answer each of the following (show all work and state the final answer to at least two decimal places.):
1 a contractor has produced the first unit of a laser targeting device at a cost of 45k. historically their learning
a newspaper finds that the mean number of typographical errors per page is four. find the probability that more than
Concrete blocks are to be used in the foundations of several buildings. The specifications state that the minimum arithmetic mean compressive strength of a sample of blocks must be 1,000 pounds per square inch (psi).
Consider Obama's health care plan. There are = #s of males and females. 50% of the females approve (A) of the plan and 70% of the males do not approve (N) of the plan.
Would it be reasonable to conclude that less than 5 percent of the employees are not able to pass the random drug test?
Develop the 90 percent confidence interval for the population mean and explain why we need to use the t distribution. What assumption do you need to make?
Military radar and missile detection systems are designed to warn a country of enemy attacks. What is the probability that 1 detection system will detect an attack.
a new muscle relaxant is available. researchers from the firm developing the relaxant have done studies that indicate
The mean difference in times between the experiment is -9.4 minutes with a standard deviation of 2.8 minutes). Construct a 90% CI for the proportion of patients who experience stomach upset with the experimental medication.
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