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Refer to given Exercise. Construct an exponentially weighted moving-average chart using a weighting constant of 0.2 for the decision-making process and comment. Is the existing process capable of meeting a goal value of 12 weeks?
Exercise The time to evaluate and make a decision on mortgage loan applications is being examined in a financial institution. Twenty-five mortgage applications are selected from the previous month and the decision-making times, in days, are shown in given Table. Construct an appropriate control chart and comment on the timeliness of the decision-making process. Revise the chart, if necessary, assuming special causes for out-of-control points. What is the expected time to make a decision? What is your estimate of the standard deviation of the time to make a decision?
In random, independent samples of 250 adults and 375 teenagers who watched a certain television show, 147 adults and 228 teens indicated that they liked the show.
Recurrence is defined as the reappearance of a metastasis in exactly the same site, or in the case of patients whose tumor never completely disappeared, enlargement of the original lesion. Times to recurrence (in weeks) for the 23 patients were: 2..
1. for same data a process called coding makes computation of the mean easier. one kind of coding involves subtracting
What advantage do experiments have over descriptive and correlational studies?- A well-designed experiment possesses what three characteristics?
Standardized measures seem to indicate that the average level of anxiety has increased gradually over the past 50 years. In the 1950s, the average score on the child manifest anxiety scale was µ=15.1. A sample of n=16 of today's children produces ..
Is there evidence that the population mean amount is different from 8.17 ounces? (Use a 0.05 level of significance.)
Assuming 95% confidence, what is the recommended sample size if the desired margin of error is 1,000 miles? Would it be reasonable to obtain this sample size? Why/why not?
a company is criticized because only 17 of 48 executives at a local branch are women. the company explains that
consider the following summary statistics for the mothers age in years and babys birth weight in grams for a sample of
Find the maximum total allowable weight if we want a 0.975 probability that this maximum will not be exceeded when 17 males are randomly selected.
The analyst concludes that the patients of physicians not participating in the program are older than the patients of participating physicians and therefore not a good comparison group for an observational study.
What is the approximate test statistic for p^ = 0.54?
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