he difference between two population proportions TY 8.2.2. Hypothesis testing for two population proportions (right-tailed z-test). 3877770.qx3zay7 Jump to level 1 A pharmaceutical company is trying to determine if a new drug is more effective than the current standard drug. The company tracks random samples of patients on each drug and calculates the proportion that see an improvement in symptoms after six months. The results of the data collected are shown below. What are the population parameters? Pick New drug Old drug Successes 261 Successes 419 What is the level of significance? Ex 0.12 Observations 300 Observations 500 Proportion 0.870 Proportion 0.838 The null hypothesis is Ho : Pnew Pick~| Pold Confidence level 99% z-score 1.227 The alternative hypothesis is Ha : Pnew Pick | Pold p-value 0.1094 Should Ho be rejected or does Ho fail to be rejected? Pick What conclusion can be drawn from the data? Pick evidence exists to support the claim that more patients on the new drug see improvements in symptoms than patients on the current drug