Identify the probability sampling techniques. Choose the most appropriate answer from the options given below.

1.Simple random sampling

2.Snowball sampling

3.Stratified random sampling

4.Convenience sampling

A1 and 2 only

B2 and 3 only

C1 and 3 only ✓ Correct

D2 and 4 only

Correct answer: (C) 1 and 3 only

Explanation

Simple random sampling and stratified random sampling are probability techniques, so statements 1 and 3 are correct.

Simple random sampling gives every unit an equal chance of selection.

Stratified random sampling divides the population into strata and samples randomly within each.

Snowball sampling recruits through referrals and is non-probability.

Convenience sampling takes easily available units and is non-probability.

Probability methods permit estimation of sampling error and valid generalisation.

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