# Question

Cost-to-charge ratios (the percentage of the amount billed that represents the actual cost) for 11 Oregon hospitals of similar size were reported separately for inpatient and outpatient services. The data are shown in the table at the top of the next column.

a. Does there appear to be a strong linear relationship between the cost-to-charge ratio for inpatient and outpatient services? Justify your answer based on the value of the correlation coefficientand examination of a scatterplot of the data.

b. Are any unusual features of the data evident in the scatterplot?

c. Suppose that the observation for Harney District was removed from the data set. Would the correlation coefficient for the new data set be greater than or less than the one computed in Part (a)? Explain.

a. Does there appear to be a strong linear relationship between the cost-to-charge ratio for inpatient and outpatient services? Justify your answer based on the value of the correlation coefficientand examination of a scatterplot of the data.

b. Are any unusual features of the data evident in the scatterplot?

c. Suppose that the observation for Harney District was removed from the data set. Would the correlation coefficient for the new data set be greater than or less than the one computed in Part (a)? Explain.

## Answer to relevant Questions

The accompanying scatterplot shows observations on hemoglobin level, determined both by the standard spectrophotometric method (y) and by a new, simpler method based on a color scale (x) (“A Simple and Reliable Method for ...Data from a survey of 1046 adults age 50 and older were summarized in the AARP Bulletin (November 2009). The following table gives relative frequency distributions of the responses to the question, “How much do you plan to ...For each of the following pairs of variables, indicate whether you would expect a positive correlation, a negative correlation, or a correlation close to 0. Explain your choice. a. Maximum daily temperature and cooling ...The relationship between hospital patient-tonurse ratio and various characteristics of job satisfaction and patient care has been the focus of a number of research studies. Suppose x = patient-to-nurse ratio is the predictor ...Explain why the slope b of the least-squares line always has the same sign (positive or negative) as does the sample correlation coefficient.Post your question

0