1. For a standard normal model, find the z-value that is less than the mean and for which 67% of the area under the standard normal curve lies to the right?
2. A sample of 850 people resulted in a confidence interval estimate for the proportion of people who believe that the Fed. Gov.'s proposed tex increse is justified is between .14 and .20. Based on this info, what was the confidence level used in the information?
3. Given H(sub A): p (no equal to) p (sub zero), what is the P-value if the test statistics is calculated to be z= -.12