A team of eye surgeons has developed a new technique for risky eye operations to restore the sight of people blinded by a certain disease. An SRS of 100 patients who have had the surgery revealed that 32 of the patients’ vision was restored. Have the conditions for calculating a confidence interval for a proportion been satisfied? Real answers only

A team of eye surgeons has developed a new technique for a risky eye operation to restore the sight of people blinded from a certain disease. Under the old method, it is known that only 30% of the patients who undergo this operation recover their eyesight. Suppose that in a random sample of 225operations performed by surgeons in various hospitals, 88 patients have fully recovered their eyesight.

4. Can we justify the claim that the new technique is better than the old one? State the null and alternative hypotheses to test such a claim.

 a)  : 0.30,  : 0.30      b)  : 0.30,  : 0.30

 c)  : 0.30,  : 0.30      d)  : 0.30,  : 0.30

 e) None of these

5. The standardized test statistic z is closest to:

 a) -2.95     b) 3.18     c) 2.95     d) 2.76     e) 1.93

6. the p-value of this test is closest to:

 a) 0.0531     b) 0.0314     c) 0.0016     d) 0.9984     e) 0.0007

7. With  , which of the following is the correct decision?

 a) Reject   because the p-value is less than  .

 b) Do not reject   because the p-value is less than  .

 c) Reject   because the p-value is greater than  .

 d) Do not reject   because the p-value is greater than  .

 e) Do not reject  because   is less than the p-value.

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

answer: sorry i can't you.

step-by-step explanation: