3. A woman wants to know what proportion of people in her town have health insurance.She comes up with three sampling ideas, described below. Discuss the pros and cons ofeach in terms of obtaining an unbiased, representative sample.a. She stands outside her local grocery store every evening for a week, from 5-7 pm, andasks every 10th person entering if they have health insurance.b. She throws ten darts at a map of the town and then tries her best to survey all thepeople who live in the houses closest to the darts.c. She posts a survey on her Facebook page and asks all her friends to share her survey.d. She pays for a small ad in the local newspaper in which she poses her question andprovides her email address and phone number and asks people to contact her to withtheir answer.
3. A woman wants to know what proportion of people in her town have health insurance.
She comes up with three sampling ideas, described below. Discuss the pros and cons of
each in terms of obtaining an unbiased, representative sample.
a. She stands outside her local grocery store every evening for a week, from 5-7 pm, and
asks every 10th person entering if they have health insurance.
b. She throws ten darts at a map of the town and then tries her best to survey all the
people who live in the houses closest to the darts.
c. She posts a survey on her Facebook page and asks all her friends to share her survey.
d. She pays for a small ad in the local newspaper in which she poses her question and
provides her email address and phone number and asks people to contact her to with
their answer.
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