In an experimental study, patients suffering from stable angina are treated with a new beta-blocker.  The number of anginal episodes experienced by the patients on the thirtieth day of treatment is shown in the table below.

Based on these data, what is the average number of anginal episodes experienced by patients treated with the new drug?

An ICU patient has an intraarterial canula placed after cardiac surgery to monitor systolic blood pressure (SBP).  Twenty four SBP values are recorded over a period of six hour, with a maximum value of 141 mmHg and a minimum value of 96 mmHg.  If the next SBP recording is 200 mmHg, which of the following is most likely to remain unchanged?

A patient with severe heart failure is placed in the ICU and undergoes invasive hemodynamic monitoring.  Over the next hour, the recorded values of his pulmonary artery wedge pressure are 26 mmHg, 20 mmHg, 20 mmHg, 27 mmHg, 14 mmHg and 27 mmHg.  Which of the following is the median of the recorded values?