math
posted by Anonymous .
13. A set of final exam scores in an organic chemistry course was found to be normally distributed, with a mean of 73 and a standard deviation of 8. What is the probability of getting a score higher that 71 on this exam?

7371 = 2
2/8 = .24 sigma below mean
go to normal distribution table
.5948 of distribution is below .24 sigma above mean 
55

Z =Variable  Mean/ Standard deviation
Z =7173/8
Z =2/8
Z = 0.25
Z value .25 = .401294
To find higher than 71
1  .401294 = 0.5987
59.87 % will get a score higher than 71 on this exam.