Post a New Question

statistics

posted by .

Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6.
What is the percentile rank of a score of 89?

  • statistics -

    Z = (score-mean)/SD

    Look up Z score on table in back ofr stats text labeled something like "areas under the normal distribution" to get proportion corresponding to the percentile rank (proportion equal to or below that score).

  • statistics -

    12.5

Answer This Question

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question