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A quality improvement project was conducted with the objective of improving the wait time in a county health department (CHD) Adult Primary Care Unit (APCU). The evaluation plan included waiting room time as one key waiting time process measure. Waiting room time was defined as the time elapsed between requesting that the patient be seated in the waiting room and the time he or she was called to be placed in an exam room. Suppose that, initially, a targeted wait time goal of 25 minutes was set. After implementing an improvement framework and process, the quality improvement team collected data on a sample of 355 patients. In this sample, the mean wait time was 23.05 minutes, with a standard deviation of 16.83 minutes. (Data extracted from M. Michael, S. D. Schaffer, P. L. Egan, B. B. Little, and P. S. Pritchard, "Improving Wait Times and Patient Satisfaction in Primary Care," Journal for Healthcare Quality, 2013, 35(2), pp. 50-60.) If you test the null hypothesis at the 0.05 level of significance, is there evidence that the population mean wait time is less than 25 minutes?
What is the probability that the number chosen will be (i) a multiple of 7, (ii) a multiple of 14?
Plot the sample ranges on the R-chart. Analyze the pattern of the R-chart. Based on R-chart findings, is the process under statistical control? Explain and justify your answer
I have five simple scenarios that state a problem, gives the p-value from an appropriate hypothesis test. For each scenario, I need to state the null and alternate hypotheses and use the given p-value to:
hen investigating a relationship between birth weight and IQ, researchers found that 258 subjects with extremely low birth weights (less than 1000 g) had Wechsler IQ scores at age 8 with a mean of 95.5 and a standard deviation of 16.0.
A study designed to evaluate the effect of the herbal remedy Echinacea purpurearandomly assigned healthy children 2 to 11 years
Choose a [business] question that you can answer with the help of statistical analysis. Briefly describe that question and why it is important to consider.
a researcher believes that the retail price of new identical automobiles differs between an urban location and a
Given a normal distribution with µ equals 50 and s equals 3, complete parts a through d
Also it is known that the probabilities are 0.15, 0.2, and 0.25 that the parts will be defective if they are produced in the ?rst, second, or third plants, respectively. What is the probability that a randomly picked part from this batch is not de..
Combine the data from the two hospitals into a single contingency table that shows the relationship between treatment and outcome. Which treatment has the higher survival rate in this combined table? Justify your answer.
a researcher would like to know whether there is a consistent predictable relationship between verbal skills and math
Explain how the company Newman's Own brand fulfills the definition of a business for profit and a non-profit business at the same time
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