In 1992, the Journal of Epidemiology and Community Health published an article that claimed that the average incubation period from infection with HIV to the development of AIDS was 6.6 years with a standard deviation of 4.5 years. Complete the following steps to determine the
In 1992, the Journal of Epidemiology and Community Health published an article that claimed that the average incubation period from infection with HIV to the development of AIDS was 6.6 years with a standard deviation of 4.5 years. Complete the following steps to determine the probability that in a sample of 400 infected individuals, the sample
(NOTE: Remember that z-scores have two decimal places and areas/probabilities have four)
Insert the following values from the question:
μ = Answer years
σ = Answer years
n = Answer individuals
What is the first z-score?
Answer
What is the second z-score?
Answer
What are the areas?
Answer
What is the probability that the sample mean is between 6.2 and 6.8 years?
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