Once again, here's the run chart of ED "walk aways" over time from the previous lesson; practice applying the four run chart rules. Which of the following do you see? (Note that there is one data point on the median, which is February 7.)
A. At least one shift (based on Rule 1)
B. At least one trend (based on Rule 2)
C. At least one shift AND at least one trend
D. Neither a shift nor a trend
