Illustrate the Standard Normal Curve. Note: Two diagrams shall be shown for each problem requirements.

The first diagram shows the Normal Curve for X, where the specific X values are indicated and the required area is shaded.

The second diagram shows the corresponding Standard Normal Curve that is, the normal Curve of Z, with the equivalent 2 score's Indicated and the required area are also shaded.

The hourly wage of 500 skilled workers is found to approximate a Normal Distribution. The average hourly wage, is computed to be P 100 with a standard deviation, of 10.

B. Find the number of workers whose hourly wages are 30%

1. Greater than or equal to P115

2. From P75 to P 118

3. Greater than or equal to P85

4. Less than or equal to 113