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A hospital has used control charts continuously since 1978 to monitor the quality of its nursing care. A set of 363 scoring criteria, or standards, are applied at critical points in the patients' stay to determine whether the patients are receiving beneficial nursing care. Auditors regularly visit each hospital unit, sample two patients, and evaluate their care. The auditors review patients' records; interview the patients, the nurse, and the head nurse; and observe the nursing care given (International Journal of Quality and Reliability Management, Vol. 9, 1992). The data in the table on page 697 were collected over a three-month period for a newly opened unit of the hospital.
a. Construct an R-chart for the nursing care process.
b. Construct an -chart for the nursing care process.
c. Should the control charts of parts a and b be used to monitor future process output? Explain
d. The hospital would like all quality scores to exceed 335 (their specification limit). Over the three month periods, what proportion of the sampled patients received care that did not conform to the hospital's requirements?
What shape curve do you get when your data set has the mean, median, and mode all with the same value? Could the value of the sample mean and the value of the population mean ever be the same?
Compute population µ and ð for the population. Find the z score for each population transform the original population into a new ppulation of N=5 with a mean µ=60 standard dev.ð=8.
the scores on a standardized test had mean of 2.711 and a standard deviation of 1.335. a teacher had 61 students take
an accounting firm is planning for the next tax preparation season. from last years returns the firm collects a
Assess the relationship between the two variables based on the scatterplot and output for the b coefficient. Is there a relationship between these two variables as hypothesized? Is it a negative or a positive relationship?
Use a statistical computer package to verify the rank-sum and the Z-statistic obtained in Exercise 20. Is the p-value the same? (Does the statistical package use a continuity correction?)
2391 women are asked which hand they preferred to use and which foot they preferred to use with results as right hand
To recognize the width of the confidence interval.As the confidence level \"1 - α\" increases, the width of the confidence interval.
Compute the probability that debt for a randomly selected borrower with good credit is more than $18,000?
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance, is the true mean greater than 10? (b) Use Excel to find the..
The chi-square goodness of fit test can be used when we:
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