What is the response (Y) of interest and how is it measured? The response of interest is the nurses’ opinion of the current state of EBP at the hospital as measured by the rating question “All of the practice changes so far have been practical and fit well with the workflow of the unit.” There are five response options for this question expressing the degree of agreement with the statement. This is an example of a 5-point Likert scale. The Likert scale is often used in surveys to measure attitudes and opinions and is an ordinal scale of measure. Ordinal data has an implied ordering or ranking and is summarized as the proportion of responses in each of the five rating categories.

Are predictor variables (X) mentioned in the problem statement? If so, how many and what are their measurement levels? The problem statement does not ask about predictors of attitude toward EBP.

What are you being asked to deliver? A data description, an interval estimate, an answer to a question, or a predictive model? An estimate of the proportion of nurses that view the current state of EBP favorably will address the problem statement. Since this is a sample statistic and subject to sampling error, a confidence interval will provide a range of plausible values for the true proportion of nurses that view EBP favorably.