13. Peter Davis teaches a course in marketing. He Grade Score in Class uses the

Question

13. Peter Davis teaches a course in marketing. He Grade Score in Class uses the system shown to the right for assigning grades to his students. From the information in the table, what percent of the students receive the grade B? Greater than x1.3s B x +0.2s to x1.3s C X- 0.2s to x+0.2s D X- 1.3s to x-0.2s F Click here to see page 1 of the table of areas. Click here to see page 2 of the table of areas. | | Below x-13s % percent of the students will receive the grade B From the information in the table, (Round to the nearest tenth as needed) 6: Standard Normal Curve Areas (page 1)

Explanation / Answer

The students who receive grade B are from 0.2 standard deviations to 1.3 standard deviations.

We need to find P(0.2 < z < 1.3)

= P(z < 1.3) - P(z < 0.2)

Using z tables

= 0.9032 - 0.5793

= 0.3239

= 32.4%.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.