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Serjik [45]
3 years ago
14

Find the critical value z Subscript alpha divided by 2 that corresponds to the given confidence level. 80​%

Mathematics
1 answer:
Neporo4naja [7]3 years ago
4 0

Answer:

Conf= 0.80

With the confidence level we can find the significance level:

\alpha =1-0.8=0.2

And the value for \alpha/2=0.1. Then we can use the normal standard distribution and we can find a quantile who accumulates 0.1 of the area on each tail and we got:

z_{\alpha/2}= \pm 1.28

Step-by-step explanation:

For this problem we have the confidence level given

Conf= 0.80

With the confidence level we can find the significance level:

\alpha =1-0.8=0.2

And the value for \alpha/2=0.1. Then we can use the normal standard distribution and we can find a quantile who accumulates 0.1 of the area on each tail and we got:

z_{\alpha/2}= \pm 1.28

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