Two airlines are randomly sampled to compare the porportion of on-time flights. out of 300 flights, 73% of the flights at A were ontime, while B had 82% of 250 flights on time. find a 95% confidence interval for the difference in the proportions. Find the a value for the weighted estimate of p and perform a 2 sample proportion test. If Type I error = .05, can we conclude there is a difference? How is that answer related to the confidence interval that was found?