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There Was a Wonderful Study Conducted in 1898 by Von

Question 110

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There was a wonderful study conducted in 1898 by von Bortkiewicz,which provides data on the death of soldiers in the Prussian army from kicks by horses and mules.The data pertain to 10 army corps,each observed over 20 years,for a total of 200 corps-years.The following table summarizes the observed data.Note that 109 corps-years had 0 deaths and 65 corps-years had 1 death,etc. There was a wonderful study conducted in 1898 by von Bortkiewicz,which provides data on the death of soldiers in the Prussian army from kicks by horses and mules.The data pertain to 10 army corps,each observed over 20 years,for a total of 200 corps-years.The following table summarizes the observed data.Note that 109 corps-years had 0 deaths and 65 corps-years had 1 death,etc. Von Bortkiewicz felt that a distribution known as the Poisson distribution would describe these data well.Using that distribution,he produced the following probabilities. What is the appropriate null hypothesis to test if the observed cell counts follow the specified distribution? A) H<sub>0</sub>: The variables deaths and probabilities are not associated B) H<sub>0</sub>: p<sub>0</sub> = 0.545;p<sub>1</sub> = 0.325;p<sub>2</sub> = 0.110;p<sub>3</sub> = 0.015;p<sub>4</sub> = 0.005 C) H<sub>0</sub>: Not all the probabilities are as specified D) H<sub>0</sub>: p<sub>0</sub> = p<sub>1</sub> = p<sub>2</sub> = p<sub>3</sub> = p<sub>4</sub> = 0.20 E) H<sub>0</sub>: p<sub>0</sub> = 0.543;p<sub>1</sub> = 0.331;p<sub>2</sub> = 0.101;p<sub>3</sub> = 0.021;p<sub>4</sub> = 0.003 Von Bortkiewicz felt that a distribution known as the Poisson distribution would describe these data well.Using that distribution,he produced the following probabilities. There was a wonderful study conducted in 1898 by von Bortkiewicz,which provides data on the death of soldiers in the Prussian army from kicks by horses and mules.The data pertain to 10 army corps,each observed over 20 years,for a total of 200 corps-years.The following table summarizes the observed data.Note that 109 corps-years had 0 deaths and 65 corps-years had 1 death,etc. Von Bortkiewicz felt that a distribution known as the Poisson distribution would describe these data well.Using that distribution,he produced the following probabilities. What is the appropriate null hypothesis to test if the observed cell counts follow the specified distribution? A) H<sub>0</sub>: The variables deaths and probabilities are not associated B) H<sub>0</sub>: p<sub>0</sub> = 0.545;p<sub>1</sub> = 0.325;p<sub>2</sub> = 0.110;p<sub>3</sub> = 0.015;p<sub>4</sub> = 0.005 C) H<sub>0</sub>: Not all the probabilities are as specified D) H<sub>0</sub>: p<sub>0</sub> = p<sub>1</sub> = p<sub>2</sub> = p<sub>3</sub> = p<sub>4</sub> = 0.20 E) H<sub>0</sub>: p<sub>0</sub> = 0.543;p<sub>1</sub> = 0.331;p<sub>2</sub> = 0.101;p<sub>3</sub> = 0.021;p<sub>4</sub> = 0.003 What is the appropriate null hypothesis to test if the observed cell counts follow the specified distribution?


A) H0: The variables deaths and probabilities are not associated
B) H0: p0 = 0.545;p1 = 0.325;p2 = 0.110;p3 = 0.015;p4 = 0.005
C) H0: Not all the probabilities are as specified
D) H0: p0 = p1 = p2 = p3 = p4 = 0.20
E) H0: p0 = 0.543;p1 = 0.331;p2 = 0.101;p3 = 0.021;p4 = 0.003

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