Question

Throwback Question: Suppose we know that the risk of liver cancer among alcoholics without cirrhosis of the liver is 25.4%. A researcher conjectures that the risk of cancer among alcoholics with cirrhosis of the liver is higher. Suppose we sample 99 alcoholics with cirrhosis of the liver and determine 30 have liver cancer. Use this information to answer the following: a. For each person in the sample, what variable is recorded? number of years diagnosed with cirrhosis level of alcoholism if the individual has liver cancer percentage of individuals with liver cancer b. Completely describe the sampling distribution for the sample proportion of alcoholics with cirrhosis who have liver cancer when samples of size 99 are selected (assuming there is no difference in occurrence between those with and without cirrhosis). o mean: Jp = o standard deviation: Op = (round to 4 decimal places) o shape the distribution of the sample proportion is Select an answer - Checks: np = and n(1 - p) = c. Test the appropriate claim using the data collected at a significance level of 0.10. • H:P ? H:P ? a = • TS: z= (round your final answer to 2 decimal places, carry 4 decimal places throughout your calculation) • probability = (round to four decimal places) • Decision: Select an answer • Interpretation:At the 0.10 level, there Select an answer significant evidence to support the claim that the incidence rate of liver cancer is Select an answer alcoholics diagnosed with cirrhosis. in

Answer 1

option it the individual has liver cancer: p=0.254 n=99 = 30 Ma = b = [0.254] oh='PCIH) - 9:25 48 0.746 = 0.0434. 99 bell shaper • The dist sibution of the sample proportion is normal np = 99 x0.254-95.946; (1-)99X0.746 = 73.854. (c) Ho: p= [0.254 2= 1000 ..TS 20 0-303–0.25% = [12] Haip 10.254) $= m = 0-303 2=Jpeg Opension IDo not reject Hol is significant evadine to support rate of liver cances sa 25.4 % In alcoholies, 6.0437 Probability 10.7372 the o. lolevel there the claim that the Thiance At