How do I do problems like this? " The time required to finish a test is normally distributed with a mean of 60 minutes and a standard deviation of 10 minutes. What is the probability a student will finish the test between 50 and 60 minutes?"

Question

anonymous · Answer

You can use the standard normal distribution curve. let me see if I can find one

anonymous · Answer

from http://www.oswego.edu/~srp/stats/6895997.htm |dw:1439294802648:dw|

anonymous · Answer

Your mean is 60 and standard deviation is 10.
So 60 goes in the middle and add 10 to the right, subtract 10 to the left.
34% lies between 50 and 60
|dw:1439294942539:dw|