3. Correct. The answer is true.

 

For 95% confidence coefficients ('two-tailed') the probability of the value lying beyond 95% confidence interval must be 0.05. Thus the corresponding critical value is t0.975. Then the required confidence coefficients are +/-t0.975. For the given values of v, these are: (a) +/-2.26, and (b) +/-2.04.