Find a 98 Percent Confidence Interval for the Paired Difference $d_{1}-d_{2} \text { where } \overline{\mathrm{D}}=1.6, s_{d}^{2}=40.96, n=30$

Find a 98 percent confidence interval for the paired difference. $d_{1}-d_{2} \text { where } \overline{\mathrm{D}}=1.6, s_{d}^{2}=40.96, n=30$