Need help - state the nullDraw a clear diagram labeling the critical values and shaded regionFind the test statistic State the conclusion

21. A team of eye surgeons has developed a new technique for risky eye operations to restore the sight of people blinded from certain disease. Under the old method it is known that only 30% of the patients who undergo this operation recover their eyesight. Suppose that surgeons in various hospitals have performed a total of 225 operations using the new method and that 88 have been successful (the patients fully recovered their sight) Can we justify that the new method is better than the old one? Use a=5%