Difference between the population means of two groups have been calculated by a researcher, the most suitable test of significance to be used will be?

Difference between the population means of two groups have been calculated by a researcher, the most suitable test of significance to be used will be?
(a) T-test
(b) Chi square
(c) W²
(d) Paired sample
✅ Answer: (a) T-test
Explanation: T-test is used to compare means of two groups.