You are interested in estimating the proportion of modules in a software
portfolio that are Y2K compliant. You examine a sample of 120 modules and
discover that 60% are compliant.
 
1. Estimate the proportion of modules in the portfolio that are Y2K
   compliant

2. Determine the "error" in your estimate for 1. above.

3. What is the "margin of error". Interpret your answer.