Question

lt the 1980s it was generally believed that con ental abnormalities affected about 7% o a large nation's children. Some 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 448 randomly selected children and fund that 51 o them sho ed signs of an abnormality. Is this strong evidence that the risk has in ea ? We consider a P value of aro nd 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, Ho:p:0. 1 138vs. HA:p#0.1138 C. yE. b) Check the necessary assumptions. Which of the following are satisfied? Select all that apply. O B. OD. F. Ho:p=0.07 vs. HA:p#0.07 Ho' p-0.07 vs. HA: p<0.07 Ho: p:0.1138 vs. Hai ρ<0.1138 Ho:p#0.1138vs. HA:p>0.1 138 Ho: p:0.07 vs. Hai p > 0.07 A. The independence assumption is satisfied. B. Less than 10% of the population was sampled. c. There are more than 10 successes and 10 falures. D. The sample is randonm, c) Perform the mechanics of the test. What is the P-value? P-value = LI (Round to three decimal places as needed.)

Just need help on part C

Answer 1

(3) Test Statistics The z-statistic is computed as follows: p - po 0.1138 - 0.07 3.637 ได้(1-po)/n = 0.07(1-0.07)/448 (4) Decision about the null hypothesis Since it is observed that z 3.637> zc-1.64, it is then concluded that the null hypothesis is rejected. Using the P-value approach: The p-value is p = 0.0001, and since p = 0.0001 〈 0.05 , it is concluded that the null hypothesis is rejected.

## answer :- p-value = 0.0001 = 0.000 = 0