\begin{table}%t5 \caption {\label{ages}Age estimates in Myr for the stellar population component of each off-nuclear radio galaxy and inactive elliptical galaxy together with the stellar population age of the combined RG and inactive elliptical samples$^{{a}}$.} %\centerline {\begin{tabular}{lllllll} \hline\hline \noalign{\smallskip} Target & CaI & & CO &(2.29) & Young&Interm.\\ \noalign{\smallskip} \hline \noalign{\smallskip} Radio Galaxies:& & & & & & \\ PKS 0023-33 & 350 & 1580 & 280 & 2000 & 315 & 1800 \\ 3C 29 & 340 & 1800 & 680 & 1260 & 510 & 1500 \\ NGC 612 & 320 & 2000 & 630 & 1580 & 480 & 1800 \\ ESO 552-G14 & 320 & 2000 & 320 & 2630 & 320 & 2300 \\ PKS 0521-36 & 280 & 2240 & -- & -- & 280 & 2200 \\ ESO 528-G36 & 310 & 2000 & 700 & 1300 & 510 & 1650\\ NGC 6998 & 350 & 1600 & -- & -- & 350 & 1600\\ PKS 2158-380 & 330 & 1800 & 700 & 1300 & 500 & 1500\\ Combined RG & 350 & 2000 & 660 & 1400 & 500 & 1700\\ & & & & & \\ Ellipticals: & & & & & \\ NGC 2640 & 320 & 2000 & 700 & 1300 & 510 & 1650 \\ NGC 4478 & 360 & 1600 & 270 & -- & 320 & 1600\\ NGC 4472 & 280 & 2140 & 400 & 2000 & 340 & 2100\\ NGC 4546 & 260 & 2240 & 380 & 2040 & 320 & 2100\\ NGC 4564 & 280 & 2140 & 400 & 2000 & 340 & 2100\\ NGC 4621 & 630 & 1100 & 370 & 2400 & 500 & 1750\\ NGC 4649 & 280 & 2100 & 370 & 2100 & 330 & 2100\\ NGC 4697 & 340 & 1800 & 360 & 2500 & 350 & 2150\\ NGC 5576 & 260 & 2300 & 320 & 2800 & 290 & 2550\\ Combined E & 340 & 1900 & 350 & 2200 & 350 & 2050 \\ \noalign{\smallskip} \hline \end{tabular}} \smallskip \par $^{{a}}$ Column (1) gives the name of target; (2) and (3) best-fit young and intermediate ages based on the {\it EW}s of CaI; (4) and (5) ages based on the {\it EW}s of CO(2.29), and (6) and (7) the average age of the young and intermediate age stellar population component. \end{table}