Find the percentile rank of a score of 147SolutionI am sorry

Find the percentile rank of a score of 147

Solution

I am sorry. But you haven\'t provided the mean and standard deviation

so I assume

Mean= 140

S.d =12

If your value varies from it Please replace in the following

First we must standardize our variable. That is, convert to a z-score.
P[X<147] = ?
Convert to z-score.

P[Z< (147-140)/12]
P[Z< .58]
Using either a z-table or your graphing calculator:
P[Z<.58] = .719
Or 71.9th percentile