In: Statistics and Probability
You are performing a left-tailed test.
If α=.10, find the critical value, to three decimal places.
zα=
how do i put this into a calculator?
Given that, you are performing a left-tailed test.
Significance level (α) = 0.10
Using TI-83 plus calculator we want to find, the z-score such that, P(Z < z) = 0.10
Step 1) Press "2nd" button then press "VARS"
Step 2) Select option "3 : invNorm" and enter values as follows :
Step 3) invNorm(0.10) and press ENTER and you will get required z-score or critical value for left-tailed test.
=> Critical value = -1.282 (rounded to three decimal places)
=> Zα = -1.282