Statistics

Solve the following neatly and completely. Write the given, solution and box your answers. 1. Fins the critical value za/2 corresponds to 99.5% confidence level.(5pts) 2. Solve for the margin of error for a 98% confidence level, the sample size is 1230, of which 40% are successes. (10pts) 3. Construct a confidence interval for item number 2. (5pts) 4. Determine the minimum sample size if the Margin of error is 0.045, with confidence level 95%, and p & & is unknown. (10pts)