An emergency department has a goal to ensure that all patients who need an X-ray receive one within an hour of arrival. The data in the sheet named ED Compliance has the percent of cases each month that met the goal over a period of two years. The staff implemented revised protocols in months 13 and 19.

using visual inspection of the histogram above, describe the compliance rate during the study period. Describe the shape of the histogram

A manufacturer produces a machined part with a target length of 200 mm. After completing maintenance on the production equipment, the staff collect measurements on the differences between samples of machined parts and the target value

By visual inspection, do the sample differences appear centered around 0? Comment on the shape of the histogram.

A regional airline company wants to reduce the number of checked bags that do not arrive at the passengers final destination on the same flight. As a first step in planning an improvement project, the improvement team collects data from a major hub over the course of 26 days. They track the count of late bags for each of two shifts per day. Since the number of checked bags per shift can vary, they report the rate as the number of late bags per 1,000 checked bags

using visual inspection of the histogram, describe a typical rate during the study period. Comment on the shape of the histogram.

Histogram of Percent 6 5 Frequency L 2 1 0 24 32 40 48 Percent Histogram of Differences (mm) 4 3 Frequency 1 0 -1.5 -1.0 0.0 0.5 1.0 -0.5 Differences (mm) Histogram of Rate 7 in 5 Frequency 3 2 1 0 2 3 4 5 6 7 8 Rate Histogram of Percent 6 5 Frequency L 2 1 0 24 32 40 48 Percent Histogram of Differences (mm) 4 3 Frequency 1 0 -1.5 -1.0 0.0 0.5 1.0 -0.5 Differences (mm) Histogram of Rate 7 in 5 Frequency 3 2 1 0 2 3 4 5 6 7 8 Rate