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Find the critical z value for a confidence level of 85%. (round answer to 2 decimal places)
. I want to know what Z-table to use and how to read it because it get me confused in reading the z table to answer this type of question

Respuesta :

Using a z-table for the value, the critical z-value for a confidence level of 85% is; ±1.439.

How to find the critical z-value?

The critical value of a distribution is defined as the value beyond which the rejection region lies.

Now, for a confidence interval , the rejection region lies beyond two values, the positive and the negative critical value.

We are given that the confidence level is 85%.

Thus, the computation of the critical value of z for 85% confidence level is expressed as follows;

±z_α/2 = ±z_0.15/2

This is simplified to get;

±z_0.075 = ±1.439

That value is concluded to be the critical z-value at the given confidence level.

Read more about Critical z-value at; https://brainly.com/question/14040224

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