# math help

posted by
**Tommy8**
.

Consider the following. (Give your answers correct to two decimal places.)

(a) Determine the value of the confidence coefficient z(á/2) for 1 - á = 0.87.

(b) Determine the value of the confidence coefficient z(á/2) for 1 - á = 0.91.

can someone just work one of these and I will do the other by looking at example