Question

A nutritional consulting company is trying to find what percentage of the population of a town is overweight. The marketing department of the company contacts by telephone 600 people from a list of the town's telephone directory. All 600 people give answers to the survey. Which of the following is the most significant source of bias in this survey?

a. Size of sample.
b. Undercoverage.
c. Voluntary response bias
d. Nonresponse.
e. Response bias.

Answer 1

Undercoverage is the most significant source of bias in the survey because certain members of the population are less likely to be included in the sample.

Step-by-step explanation:

The most significant source of bias in this survey is undercoverage. Undercoverage occurs when certain members of the population have a lower chance of being included in the survey sample. In this case, the survey is conducted through telephone calls from a list of the town's telephone directory. However, not everyone has a telephone, and cell phone numbers are often not listed in published directories. Additionally, some individuals may not be at home during the time of the phone call, further limiting the representativeness of the sample.

Answer 2

it is undercoverage bias