Coronary bypass surgery: A healthcare research agency reported that 43% of people who had coronary bypass surgery in 2008 were over the age of 65. Eleven coronary bypass patients are sampled. Part 1...

Extracted text: Coronary bypass surgery: A healthcare research agency reported that 43% of people who had coronary bypass surgery in 2008 were over the age of 65. Eleven coronary bypass patients are sampled. Part 1 of 2 (a) What is the mean number of people over the age of 65 in a sample of 11 coronary bypass patients? Round the answer to two decimal places. The mean number of people over the age of 65 is Part 2 of 2 (b) What is the standard deviation of the number of people over the age of 65 in a sample of 11 coronary bypass patients? Round the answer to four decimal places. The standard deviation of the number of people over the age of 65 is