Posted by **Tommy8** on Saturday, June 22, 2013 at 8:23am.

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

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