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You are tasked with construction of a survey to estimate the proportions of the 6.741 billion...

You are tasked with construction of a survey to estimate the proportions of the 6.741 billion world population living with HIV/AIDS. A past survey obtained results for 2005 show nearly 27 million people living with HIV/AIDS.

a) How many people do you need to sample in order to construct a 95% confidence interval that is within 2 million of the parameter?

b) From past surveys on HIV/AIDS there is considered to be a 5% probability that your results will be much to low - below 10% or more. There is also a 3% chance that your survey will be much too high - over 10% or more. Based on the previous results what is the probability that your results will be either too low or too high? What probability rule did you use to answer this question?

Math   Statistics-And-Probability   
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