Question

Compute the critical value z Subscript alpha divided by 2 that corresponds to a 86​% level of confidence.

Answer 1

z = 1.476

Explanation:

We have that to find our
`\alpha` level, that is the subtraction of 1 by the confidence interval divided by 2. So:

`\alpha = (1-0.86)/(2) = 0.07`

Now, we have to find z in the Ztable as such z has a pvalue of
`1-\alpha`.

So it is z with a pvalue of
`1-0.07 = 0.93`, so
`z = 1.476`

The answer is z = 1.476