Compute the critical value z a2 that corresponds to a 87 lev

Compute the critical value z a/2 that corresponds to a 87% level of confidence

z a/2 = ?

(round to two decimal places as needed)

Solution

in this we have to calculte the critical value of z at a=87%. So for this middle area is 87%. The area to the right is (100-87)/2 = 6.5 % = .065 .

so the area is 1-0.065=0.935. beacuse we want area in the middle, not the area in the tail. so from tha normal table ,the area is 1.51. This is your critical value for a confidence level of 87%.