math help and check
posted by Tommy7 on .
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.
.44 my answer
(b) Determine the value of the confidence coefficient z(á/2) for 1  á = 0.91.
.45 my answer

To late to get any help, But thanks