Question

it he 1980s it was generally believed that con enital abnormal ties affected aboutア of a large nation's ch dren ome people believe that the increase in the number o chemicals in the environment has led to an increase in the incidence o abnormalities. A recent study examined 358 randomly selected children and ound hat 28 of the showed signs of an abnormality. Is this strong ev dence that the nsk has increased? We consider a P-value of around 5% to represent reasonable evidence.) Complete parts a through f. Assume the independence assumption is met. a) Write appropriate hypotheses. Let p be the proportion of children with genetic abnormalities. Choose the correct answer below. OA H: p0.0vs. H: p0.07 ° C. Ho: p = 0.0782 vs. Ha·pe 0.0782 O B. Ho: p-0.07 vs. HA: p#0.07 O D. Hr:p 0.0782 vs. H p 0.0782 O E. F. H: p 0.07 vs. HA: p> 0.07 Hj: p = 0.0782 vs. HA:p#0.0782 b) Check the necessary assumptions. Which of the following are satisfied? Select all that apply. □ A. Less than 10% of the population was sampled. □ B. The independence assumption is satisfied. C. The sample is random. D. There are more than 10 successes and 10 failures. c) Perform the mechanics of the test. What is the P-value? P-value Round to three decimal places as needed.) d) Explain carefully what the P-value means in this context. Choose the correct answer below O A· The P-value is the chance of observing 28 or more children with genetic abnormalities in a random sample of 358 children if 7% of children actually have genetic abnormalities. B. C. O D· The P-value is the actual percentage of children who have genetic abnormalities. The P-value is the chance of observing 7% of children with genetic abnormalities. The P-value is the chance of observing 28 or more children with genetic abnormalities in a random sample of 358 children.

Answer 1

아how : tHa ๒.04 는 0.0782-o.o 2 709 0.2구.) o. chidu ol (o.oj