Question

checkpoint question: for our 99% confidence interval shaded in purple, which is symmetric about the mean of the pictured sampling distribution, the remaining 1% of the leftover area of the curve is split up into 0.5% (or.005) each on the left side and the right side shaded in green.
how would you use the ti - 84 calculator to calculate the exact z* critical value here for warm - up (c)?
briefly explain below but be specific!
type your answer here

Explanation:

To find the \( z^{*} \) critical value for a 99% confidence interval (where the area in the left - tail is \( 0.005 \)) on a TI - 84 calculator:

1. Press the 2nd key, then VARS (DISTR).
2. Select invNorm(.
3. Enter the area to the left of the critical value (\( 0.005 \)), the mean (\( 0 \)), and the standard deviation (\( 1 \)) in the format invNorm(area, mean, standard deviation). So, you would enter invNorm(0.005, 0, 1).

Answer:

Press 2nd then VARS (DISTR), select invNorm(, enter 0.005, 0, 1), and press ENTER. The calculator will display the \( z^{*} \) value.