In: Statistics and Probability
Suppose that we sample 180 diabetic patients between the ages of 50-60 in the United States. 50 of them report being diagnosed with diabetic neuropathy. Nationally, 1 out of 3 diabetics within this age group report neuropathy. What is the appropriate hypothesis test to use if we are interested in determining whether the proportion of diabetics in the sample with neuropathy is significantly different from the proportion of diabetics with neuropathy in the entire population?
Nationally, 1 out of 3 diabetics within this age group report neuropathy
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we are interested in determining whether the proportion of diabetics in the sample with neuropathy is significantly different from the proportion of diabetics with neuropathy in the entire population
In this case
sample proportion p = 50/180 = 0.2778
We need to determine if the proportion of diabetics in the sample is significantly different from the proportion of diabetics with neuropathy in the entire population
Null hypothesis: the proportion of diabetics in the sample is same as the proportion of diabetics with neuropathy in the entire population
Alternate hypothesis: the proportion of diabetics in the sample is different than the proportion of diabetics with neuropathy in the entire population
The test used should be Z test