Math 143 C/E, Spring 2001
IPS Reading Questions
Chapter 8, Section 1, Part 2: pp. 588-595

1. In the description of the “Large-Sample Significance Test for a Population Proportion” (see p. 589), the denominator for the z statistic uses the value p₀ proposed in the null hypothesis instead of the standard error of . Why is this?

   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

2. If you want the margin of error for a 95% confidence interval for a population proportion to be less than 0.01, what sample size should you use at a minimum? Would your answer change if you knew that the population proportion was no bigger than 0.25?