# statistics

posted by .

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 -

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.

## Similar Questions

1. ### Statistics

Biologists studying the healing of skin wounds measured the rate at which new cells closed a razor cut made in the skin of an anesthetized newt. Here are data from 18 newts, measured in micrometers per hour: 29,27,34,40,22,28,14,35,26,35,12,30,23,18,11,22,23,33. …
2. ### Statistics Help

A medical statistician wanted to examine the relationship between the amount of sunshine (x) and incidence of skin cancer (y). As an experiment, he found the number of skin cancers detected per 100,000 of population and the average …
3. ### statistics

A medical statistician wanted to examine the relationship between the amount of sunshine (x) and incidence of skin cancer (y). As an experiment he found the number of skin cancers detected per 100,000 of population and the average …
4. ### precalc

The depletion of the Earth's ozone layer has created concern among some health experts. They believe that dramatic increases in the number of illnesses and deaths due to ultraviolet radiation rays may occur as a result of breaks in …
5. ### precalc

It's estimated that 9,300 deaths occurred from skin cancer at the end of year 2000 and that 200,000 deaths from skin cancer might occur by the end of 2050. Assuming the number of annual number of skin cancer deaths increases geometrically, …
6. ### Statistics

The question is: In a study of 420,000 cell phone users in Denmark. It found that 135 developed cancer of the brain or nervous system. If we assume that such a cancer is not affected by cell phone, the probability of a person having …
7. ### Math

Incidence rate: Women 125 per 100,000 Men 1.2 per 100,000 This statistic says that for every 100,000 women in the U.S., 125 developed breast cancer. For every 100,000 men, fewer than two developed breast cancer. From these numbers, …
8. ### Math

Incidence rate: Women 125 per 100,000 Men 1.2 per 100,000 This statistic says that for every 100,000 women in the U.S., 125 developed breast cancer. For every 100,000 men, fewer than two developed breast cancer. From these numbers, …
9. ### anthropology

is the changing American belief from tanned skin being healthy to tanned skin being related to skin cancer is an example of culture being: cumulative. diffusive. adaptive.
10. ### Statistics

A study of 420,048 cell phone users found that 135 of them developed cancer of the brain or nervous system. prior to this study of cell phone use the rate of such cancer was found to be 0.0333% for those not using cell phones. Complete …

More Similar Questions