In online surveys, which of the following are sampling issues?

1.People in a household may use the same computer, as they have access to only one

2.Many respondents may have multiple email IDs

3.Internet users constitute a biased sample of the population

4.Sampling frames for online surveys are cheap

5.The government restricts online surveys

A1, 2 & 3 only ✓ Correct

B2, 3 & 4 only

C3, 4 & 5 only

D1, 3 & 4 only

Correct answer: (A) 1, 2 & 3 only

Explanation

The genuine sampling problems are shared household computers, multiple email IDs, and internet users forming a biased sample.

One computer per household lets several members appear as a single unit.

Multiple email IDs let one person enter the frame more than once.

Internet users differ systematically from the general population, biasing coverage.

Cheap sampling frames describe cost, not a sampling defect.

The claim that the government restricts online surveys is factually baseless.

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