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Q1) According to Information Almanac. 80% of adult smokers started smoking before turning 18 years of age. Assume 10 smokers, 18 years of age or older are arbitrarily chosen and number of smokers who started smoking before 18 is recorded.
i) Determine the probability P (1.23)
ii) Suppose the random variable X is normally distributed with mean =50 and standard deviation =7 calculate P(X )
Q2) A 2003 Study found that medical students mean number of hours worked in a week is 81.7. Assume number of hours worked per week by medical residents is approximately normally distributed, with standard deviation of 6.9 hours.
i) Determine the probability that randomly selected medical resident works more than 100 hours in a week.
ii) Find out the probability that randomly selected medical resident works less than 60 hours in a week.
Questions based on binomial distribution, variance of the binomial distribution, discrete random variable and continuous random variables.
A case-control study of relationship between liver cirrhosis among both non alcoholics and alcoholics. Describe whether smoking is confounder.
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Test the whether the attitude toward keeping weight down associated with smoking status.
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Determine the estimated population mean?
Katie is studying aggression among adolescent girls. She believes that there is a relationship between the level of interaction a girl has with her mother and her level of aggression.
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Suppose the population is normally distributed they make a decision to do a hypothesis test.
Support colour-coding on packaged food to indicate healthier options
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