Asked by Lisa
You are studying the rate of incidence of skin cancer in people who live near the equator. Your survey of 200 people from the area has shown that 7 of them developed skin cancer.
Provide a 99% confidence interval for the true rate of incidence.
Provide a 99% confidence interval for the true rate of incidence.
Answers
Answered by
MathGuru
Example of a proportional confidence interval formula:
CI99 = p + or - (2.58)[√(pq/n)]
...where p = x/n, q = 1 - p, and n = sample size.
Note: + or - 2.58 represents 99% confidence interval.
For p in your problem: 7/200 = .035
For q: 1 - p = 1 - .035 = .965
n = 200
I let you take it from here to calculate the interval.
CI99 = p + or - (2.58)[√(pq/n)]
...where p = x/n, q = 1 - p, and n = sample size.
Note: + or - 2.58 represents 99% confidence interval.
For p in your problem: 7/200 = .035
For q: 1 - p = 1 - .035 = .965
n = 200
I let you take it from here to calculate the interval.
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