Wednesday

April 16, 2014

April 16, 2014

Posted by **Karly** on Saturday, May 23, 2009 at 10:42am.

i understand how to translate the pas given the z-scores; however, i don't understand this question:

the president of the university wishes to graduate the top 16% of students with cum laude honors and the top 2.5% with summa cum laude honors. where should the limits be set in terms of z-scores [approx]? in terms of GPAs? what assumption if any did you make about the distribution of the GPAs at the university?

am i supposed to assume that there's a normal distribution? i don't understand how to get the answers to this question.

thank you.

- Statistics -
**Karly**, Saturday, May 23, 2009 at 11:00amoh wait...should use the 97.5 percentile to get the answer to the 2.5% top students?? because they wouldn't have negative z-scores, right?

- Statistics -
**Damon**, Saturday, May 23, 2009 at 11:11amYes, assume a normal distribution.

100 - 2.5 = 97.5%

so any F(z) > .975 gets Summa

My table of z versus F(z) is pretty crude.

for example it has entries

z = 1.9 when F(z) = .971

z = 2.0 when F(z) = .977

We know that somewhere between z = 1.9 and z = 2.0, F (z) = .975

Say maybe any z over 1.95 gets summa.

Now do the same thing for F(z) = 1-.16 = .84

find z for f(z) = .84 (z around 1.0)

any z between there and 1.95 gets cum laude

- Statistics -
**Damon**, Saturday, May 23, 2009 at 11:12amYes

**Related Questions**

college stats - can someone please explain the steps: suppose that the grade ...

statistics - In a study of the effect of college student employment on academic ...

statistics - The GPAs of all students enrolled at a large university have an ...

statistics - suppose we went to test the claim that the average GPA of all ...

statistics - 14) You wish to compare the average GPA of students from one ...

stats please help ASAP!!! - A. The GPAs of all 5540 students enrolled at a ...

Statistic - At one college, GPA's are normally distributed with a mean of 2.7 ...

math - Statistics: Analyze student exam scores Students were given an exam with ...

statistics - The mean GPA (grade point averagE. of all male students at a ...

Statistics - Students were given an exam with 300 multiple-choice questions. The...