Throwback Question:Suppose we know that the risk of liver canceramong alcoholics without cirrhosis of the liver is 28.6%. A researcher conjectures that the risk of canceramong alcoholics with cirrhosis of the liver is higher. Suppose we sample95 alcoholics with cirrhosis of the liver and determine 37 have liver cancer. Use this information to answer the following:

1. For each person in the sample, what variable is recorded?

• number of years diagnosed with cirrhosis
• percentage of individuals with liver cancer
• level of alcoholism
• if the individual has liver cancer

1. Completely describethe sampling distribution for the sample proportion of alcoholics with cirrhosis who have liver cancer when samples of size 95 are selected (assuming there is no difference in occurrence between those with and without cirrhosis).

• mean:
• p
• p^
• =
• standard deviation:
• p
• p^
• =(round to 4 decimal places)
• shape:the distribution of the sample proportion isSelect an answer
• normally distributed
• not normally distributed
• Checks: np =and n(1 - p) =

1. Test the appropriate claim using the data collected at a significance level of 0.10.

• H
• o
• Ho
• : p?
• >
• =
• <
• H
• a
• Ha
• : p?
• =
• <
• >
• =
• 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
• fail to reject H
• reject H
• Interpretation:At the 0.10 level, thereSelect an answer
• is
• is not
• significant evidence to support the claim that the incidence rate of liver cancer isSelect an answer
• lower
• different than
• higher
• in alcoholics diagnosed with cirrhosis.