Posted by Lisa on Thursday, March 1, 2012 at 7:22pm.
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.

statistics  MathGuru, Friday, March 2, 2012 at 4:51pm
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.
Answer This Question
Related Questions
 precalc  It's estimated that 9,300 deaths occurred from skin cancer at the end ...
 Statistics Help  A medical statistician wanted to examine the relationship ...
 Statistics  A study of 420,048 cell phone users found that 135 of them ...
 statistics  A medical statistician wanted to examine the relationship between ...
 precalc  The depletion of the Earth's ozone layer has created concern among ...
 Statistics  The question is: In a study of 420,000 cell phone users in Denmark...
 anthropology  is the changing American belief from tanned skin being healthy to...
 Math  Incidence rate: Women 125 per 100,000 Men 1.2 per 100,000 This statistic ...
 Math  Incidence rate: Women 125 per 100,000 Men 1.2 per 100,000 This statistic ...
 Statistics  Biologists studying the healing of skin wounds measured the rate at...
More Related Questions