With 90% confidence interval and n = 15. Find left critical value for Zinterval. Group of...

Question

Question

With 90% confidence interval and n = 15. Find left critical value for Zinterval.

Group of answer choices

-1.282

-1.645

-1.761

-1.345

Answer 1

Answer #1

Correct option:

- 1.282

Explanation:

Given: 90% confidence interval

So,

Significance Level = $\alpha$ =0.10

Left critical value for Z interval.is required..

So, it one tail - left side interval.

From Table,

critical value of Z = - 1.282

Answer 2

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