Questions: Find the indicated z-scores shown in the graph.
The z-scores are
(Use a comma to separate answers as needed. Round to two decimal places as needed.)
Transcript text: Find the indicated z-scores shown in the graph.
The z-scores are
(Use a comma to separate answers as needed. Round to two decimal places as needed.)
Solution
Solution Steps
Step 1: Find the area between 0 and z
The area under the curve between _z_ = 0 and _z_ = ? is given as 0.4719.
Step 2: Consult the z-table
We look for the z-score corresponding to a cumulative area of 0.5 + 0.4719 = 0.9719. In the z-table, the closest value to 0.9719 is 0.9719, which corresponds to a z-score of 1.91.
Step 3: Determine the signs
Since the graph is symmetric and the areas to the left and right of the mean (0) are equal, the two z-scores are equal in magnitude and opposite in sign.