Find the Critical value t a/2 needed to construct a confidence interval of the given level with the given sample size. Round the answers to three decimal places.

Find the critical value tan needed to construct a condence interval of the given level with the given sample size. Round the answers to three decimal places. (a) For level 80% and sample size 7 (b) For level 98% and sample size 10 Critical value = E] (c) For level 90% and sample size 30 Critical value = E] (d) For level 99% and sample size 14 Critical value nonle-lonlelmlalols