It the 1980s, it was generally believed that congenital abnormalities affected about 7% of a large nation's children. Some people believe that the increase in the number of chemicals in the environment has led to an increase in the incidence of abnormalities. A recent study examined 394 randomly selected children and found that 30 of them showed signs of an abnormality. Is this strong evidence that the risk has increased? (We consider 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. O A. Ho: p=0.0761 vs. HA: p>0.0761 OB. Ho: p=0.07 vs. HA: P = 0.07 OC. Ho: p=0.0761 vs. HA: P<0.0761 OD. Ho: p=0.07 vs. HA: P <0.07 E. Ho: p=0.07 vs. HA: p > 0.07 OF. Ho: p=0.0761 vs. HA: P# 0.0761 b) Check the necessary assumptions. Which of the following are satisfied? Select all that apply. A. The independence assumption is satisfied. B. There are more than 10 successes and 10 failures. c. Less than 10% of the population was sampled. D. The sample is random. c) Perform the mechanics of the test. What is the P-value? (Round to three decimal places as needed.) P-value=
It the 1980s, it was generally believed that congenital abnormalities affected about 7% of a large nation's children. Some people believe that the increase in the number of chemicals in the environment has led to an increase in the incidence of abnormalities. A recent study examined 394 randomly selected children and found that 30 of them showed signs of an abnormality. Is this strong evidence that the risk has increased? (We consider 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. O A. Ho: p=0.0761 vs. HA: p>0.0761 OB. Ho: p=0.07 vs. HA: P = 0.07 OC. Ho: p=0.0761 vs. HA: P<0.0761 OD. Ho: p=0.07 vs. HA: P <0.07 E. Ho: p=0.07 vs. HA: p > 0.07 OF. Ho: p=0.0761 vs. HA: P# 0.0761 b) Check the necessary assumptions. Which of the following are satisfied? Select all that apply. A. The independence assumption is satisfied. B. There are more than 10 successes and 10 failures. c. Less than 10% of the population was sampled. D. The sample is random. c) Perform the mechanics of the test. What is the P-value? (Round to three decimal places as needed.) P-value=
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Please answer Part C correctly
Transcribed Image Text:It the 1980s, it was generally believed that congenital abnormalities affected about 7% of a large nation's children. Some people believe that the increase in the number of chemicals in the environment has led to
an increase in the incidence of abnormalities. A recent study examined 394 randomly selected children and found that 30 of them showed signs of an abnormality. Is this strong evidence that the risk 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.
O A. Ho: p=0.0761 vs. HA: p>0.0761
OB. Ho: p=0.07 vs. HA: P = 0.07
O C. Ho: p=0.0761 vs. HA: P<0.0761
O D. Ho: p=0.07 vs. HA: P<0.07
E. Ho: p=0.07 vs. HA: P >0.07
O F. Ho: p=0.0761 vs. HA: P# 0.0761
b) Check the necessary assumptions. Which of the following are satisfied? Select all that apply.
A. The independence assumption is satisfied.
LYB.
There are more than 10 successes and 10 failures.
C. Less than 10% of the population was sampled.
D. The sample is random.
c) Perform the mechanics of the test. What is the P-value?
P-value =
(Round to three decimal places as needed.)
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