1. A hospital is analyzing nosocomial infections and wants to reduce their infection rate below the national average of 2.0%. They have sampled 40 cases every week for the last 20 weeks.

The data are shown below. Create p and np control charts. Interpret the graphs. How is the hospital performing in relation to its stated goal?

Sample Infections Sample Infections 1 2 11 3 2 1 12 4 3 1 13 2 4 2 14 3 5 1 15 4 6 1 16 5 7 3 17 3 8 2 18 4 9 1 19 5 10 2 20 6