The lecture Comparing two Proportions by David Spade, PhD is from the course Statistics Part 2. It contains the following chapters:
Which of the following is TRUE regarding the variability in the difference between sample proportions?
Which of the following is NOT one of the conditions for the TwoProportion procedure?
Which of the following is a CORRECT interpretation of the 95% confidence interval for p1  p2 based on the difference ˆp1 ˆp2 and given by ( a , b )?
Which of the following is TRUE of the hypothesis test for a difference in two population proportions?
Which of the following is a CORRECT interpretation of a rejection of the null hypothesis that there is no difference between the proportions in each population?
Suppose proportion 1 is = 0.54, sample size 1 is = 450, proportion 2 is = 0.37, and sample size 2 is = 280. What is the confidence interval for the difference in proportions?
Suppose proportion 1 is = 0.4, sample size 1 is = 50, proportion 2 is = 0.8, and sample size 2 is = 30. What is the value of the pooled proportion?
Suppose proportion 1 is = 0.3, proportion 2 is = 0.4, and pooled proportion is 0.6. What is the value of the pooled standard deviation?
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