There are 255 clinics in a large city and a sample of 25 clinics is chosen by SRSWOR. The number of patients who came to this these clinics for treatment in a week are given below. 450, 410, 275, 310, 467, 123, 79, 103, 401, 245, 278, 67, 190, 237, 59, 112, 302, 409, 417, 289, 346, 400, 316, 88, 90 Using normal approximation, a 95% confidence interval for the proportion of clinics in the city with fewer than 100 patients per week, will be approximately given by, (fpc cannot be ignored, continuity correction is to be ignored )

Q: What sampling method was used?

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A: The seven major steps of sampling is given below:

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