DISCUSSION - Incidence of kidney cancer
Looking at cancer data by county, a researcher found that a small, rural county in the Midwest had the highest rate of kidney cancer. Another small, rural county had the lowest rate of kidney cancer. Give a plausible explanation for this.
The plausible explanation for rural county in the Midwest having the highest rate of kidney cancer and another small, rural county having the lowest rate of kidney cancer is the size of the sample (n) being extremely small.
When the sample size (n) is very small, even the addition of 1 kidney cancer will drastically increase the rate of kidney cancer., whereas in the case of larger sample, we require sufficiently large number of kidney cancer to increase the rate of kidney cancer.considerably. So, in making conclusion based on survey, we should put more confidence on large sample and less confidence on small samples.
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