99 confidence interval z score

Find the critical value z_alpha/2 that corresponds to a 72.5 percent confidence level. Find the critical values, z-scores, for the following confidence intervals by showing a graph and respective areas a) 90% z-scores. b) 99% t-scores, n = 51. Find the value of z / 2 that corresponds to a level of confidence of 94.76 percent. jawaban pai kelas 11 hal 99