SOLUTION: Assume a population with a mean of 136 and a standard deviation of 12. A. Find the percentile rank of a score of 131. a. 33.72% b. 41.6% c. 124% d. 28.63% B. Fin

Algebra ->  Probability-and-statistics -> SOLUTION: Assume a population with a mean of 136 and a standard deviation of 12. A. Find the percentile rank of a score of 131. a. 33.72% b. 41.6% c. 124% d. 28.63% B. Fin      Log On


   

Question 469746: Assume a population with a mean of 136 and a standard deviation of 12.
A. Find the percentile rank of a score of 131.
a. 33.72%
b. 41.6%
c. 124%
d. 28.63%
B. Find the percentage of scores in between a score of 120 and a score of 140.
a. 20.00%
b. 40.82%
c. 53.75%
d. 13.33%

Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
A.
z=(131-136)/12=-0.42
area under the normal curve below .42 is .3372 a.
.
Ed