I happened upon your forum today and I am in need of assistance. I am an elementary school teacher with a very limited math background. I am literally a few statistics test questions away from completing my Master's. I have tried listening to the professor's videos and using notes but, with it being an online class, I am having trouble trying to teach myself. I would be ever grateful for any help offered!

Question

Over the past few years 225 students in sections of EDUR 7130 I've taught have completed the final test of three tests administered in that course. The overall mean is 82.3 with a standard deviation of 9.0. These data are nearly normal in distribution; given this answer the following questions:

(a) What percentage of students will score 85.3 or higher on this test?

(b) What is the percentile rank for a student with a score of 91.3?

(c) What is the raw test 3 score for a student with a z score of -1.5?

(d) What is the raw test 3 score for a student with a z score of 0.00?