A pacemaker is a small electric generator and controller that provides a steady rate of electrical pulses to a patient's heart to overcome irregular heartbeat. The failure rate of pacemaker generators in the US is approximately 5 in 100 each year. You are designing a new pacemaker for use in clinical trials. You install it in a sample of 20 patients with heart arrhythmia. After 1 year, you nd that two of the pacemakers had to be replaced due to a failed generator. What do you conclude about the quality of your new generator