Using the Z score calculated in Step 3 and the critical value calculated in Step 2 (alpha = 0.01), is the z-score in the critical region? What is our conclusion?

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Please use the Unit Normal table to answer the following questions about critical values. Remember to consider both sides of the distribution (split the alpha level) for these questions.

Step 2

What would be the critical value at = .01? = 2.58 What would be the critical value at = .001? 3.30

Step 3

Thinking back to the newborn infant example, we have:

=26 =4 n=16

Let's say we calculate a sample mean of 30 pounds for the stimulated infants. What is the z-score associated with a sample mean of 30? (hint: use your notes/ the z-score calculation formula