Exam scores were normal in BIO 200 Jasons exam score was one

Exam scores were normal in BIO 200. Jason\'s exam score was one standard deviation above the mean. What percentile is he in?

Solution

1 standard deviation above the mean means his z score = 1.

Using a table/technology, the left tailed area of this is          
          
P(z <   1   ) =    0.841344746

Thus, he is at the 84.13th percentile. [ANSWER]