Two researchers conduct separate studies to test h0: p 0.50 against ha: p 0.50, each with n = 400, researcher a has 220 observations in the category of interest, and p a-220/400 = 0.550. researcher b has 219 in the category of interest, and pe-219/400 0.5475. (a) for researcher a, what is the. statistic? use 2 decimal places -value? use 3 decimal places. (b) for researcher b, what is the.. statistic? use 2 decimal places. -value? use 3 decimal places. (c) using α = 0.05, are the results statistically significant? only researcher a's result is statistically significant. ( only researcher b's result is statistically significant. the results of both researchers are statistically significant. neither of the researchers' results are statistically significant. (d) are the results of the two researchers different from one another in a practical sense? what does this imply? yes. that is why it is important to report decisions only yes, that is why it is important to report p-values and not just decisions no. that is why it is important to report decisions only no. that is why it is important to report p-values and not just decisions. ( (e) using 3 decimal places, what is the 95% confidence interval for p for a? b?