Robert Klassen Manufacturing, a medical equipment manufacturer, subjected 100 heart pacemakers to 4,500 hours of
testing. Halfway through the testing, 5 pacemakers failed.
The failure rate in terms of:
a) Percent of failures = 5 % (enter your response as a percentage rounded to one decimal place).
b) Number of failures per unit-hour of operating time =
enter your response here failures per hour (round your response to eight decimal places).
