Problem

Question 1 For a confidence level of $85 \%$, find the critical value Submit Question

Solution

Step 1 :The critical value for a confidence level can be found using a Z-table or a statistical calculator. The critical value is the number of standard deviations a particular sample must be from the mean to fall within the desired confidence level.

Step 2 :For a confidence level of 85%, the significance level (alpha) is 1 - 0.85 = 0.15.

Step 3 :Since we are considering a two-tailed test (values can fall either above or below the mean), we divide the alpha by 2, which gives us 0.075.

Step 4 :We then look up this value in the Z-table to find the critical value.

Step 5 :The critical value is approximately 1.44.

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