t 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 426 randomly selected children and found that 34 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. C a) Write appropriate hypotheses. Let p be the proportion of children with genetic abnormalities. Choose the correct answer below. A. Ho: p=0.07 vs. HA: P = 0.07 B. Ho: p=0.07 vs. HA: p > 0.07 OC. Ho: p=0.0798 vs. HA: p > 0.0798 O D. Ho: p=0.07 vs. HA: P <0.07 OE. Ho: p=0.0798 vs. HA: P# 0.0798 OF. Ho: p=0.0798 vs. HA: P<0.0798 ) Check the necessary assumptions. Which of the following are satisfied? Select all that apply. A. The independence assumption is satisfied. B. Less than 10% of the population was sampled. c. The sample is random. There are more than 10 successes and 10 failures.
t 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 426 randomly selected children and found that 34 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. C a) Write appropriate hypotheses. Let p be the proportion of children with genetic abnormalities. Choose the correct answer below. A. Ho: p=0.07 vs. HA: P = 0.07 B. Ho: p=0.07 vs. HA: p > 0.07 OC. Ho: p=0.0798 vs. HA: p > 0.0798 O D. Ho: p=0.07 vs. HA: P <0.07 OE. Ho: p=0.0798 vs. HA: P# 0.0798 OF. Ho: p=0.0798 vs. HA: P<0.0798 ) Check the necessary assumptions. Which of the following are satisfied? Select all that apply. A. The independence assumption is satisfied. B. Less than 10% of the population was sampled. c. The sample is random. There are more than 10 successes and 10 failures.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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what is the p value
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 426 randomly selected children and found that 34 of them showed signs of an abnormality. Is this strong evidence that the risk
increased? (We consider a P-value of around 5% to represent reasonable evidence.) Complete parts a through f. Assume the independence assumption is met.
has
a) Write appropriate hypotheses. Let p be the proportion of children with genetic abnormalities. Choose the correct answer below.
O A. Ho: p=0.07 vs. HA: P = 0.07
B. Ho: p=0.07 vs. HA: p > 0.07
O C. Ho: p=0.0798 vs. HA: p>0.0798
O D. Ho: p=0.07 vs. HA: P < 0.07
O E. Ho: p=0.0798 vs. HA: P# 0.0798
OF. Ho: p=0.0798 vs. HA: P<0.0798
b) Check the necessary assumptions. Which of the following are satisfied? Select all that apply.
A. The independence assumption is satisfied.
Less than 10% of the population was sampled.
The sample is random.
There are more than 10 successes and 10 failures.
B.
C.
D
C
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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