## P Chart

The P Chart plots the percentages for each period
as a point on the line. The percentage is the total numerator for that
period (Total Beta Blockers Administered Prior to Arrival) divided by the total
denominator of that period (Total eligible for Beta Blockers). This chart
uses a sigma determined by the number of points plotted on the chart.

This analysis type, P Chart, automatically calculates
the number of sigmas to use to calculate the control limits, depending on the
number of periods display. See
T Table
for further information.

The P chart addresses those indicators where we are measuring
one of two possible outcomes of an event. Often, compliance indicators
come to mind for these types of charts. For example, "Beta Blockers Prior
to Arrival": For each patient arriving, did they receive beta blocker
prior to arrival?

The numerator is the number of patient receiving beta blockers
and the denominator is the number arriving. The numerator is a subset of
the patients in the denominator and the resulting percentage cannot exceed 100%.

Other chart available for the Percentage Type are
Bar Chart,
P Chart 3-Sigma,
P Chart 2-Sigma,
Bar Chart with Cumulative,
Run Chart and
Trend Chart.