**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 t_{0.975}. Then the required
confidence coefficients are +/-t_{0.975}. For the given values of v,
these are: (a) +/-2.26, and (b) +/-2.04.