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 O c. Ho: p=0.0761 vs. HA: P<0.0761 O E. Ho: p=0.07 vs. HA: p>0.07 B. Ho: p=0.07 vs. HA: P = 0.07 D. Ho: p=0.07 vs. HA: P <0.07 Ho: p=0.0761 vs. HA: P# 0.0761 OF.

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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
O c. Ho: p=0.0761 vs. HA: p<0.0761
O E. Ho: p=0.07 vs. HA: P >0.07
B. Ho: p=0.07 vs. HA: P# 0.07
O D. Ho: p = 0.07 vs. HA: P < 0.07
OF. Ho: p=0.0761 vs. HA: p‡0.0761
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 O c. Ho: p=0.0761 vs. HA: p<0.0761 O E. Ho: p=0.07 vs. HA: P >0.07 B. Ho: p=0.07 vs. HA: P# 0.07 O D. Ho: p = 0.07 vs. HA: P < 0.07 OF. Ho: p=0.0761 vs. HA: p‡0.0761
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