Mathematics, 07.04.2020 21:09 brandon56238
The length of time needed to complete a certain test is normally distributed with mean 77 minutes and standard deviation 11 minutes. Find the probability that it will take less than 63 minutes to complete the test.
Answers: 3
and 
. In order to find the probability of X being less than 63, we use the 
, has well known values. You can find the values of 
for any positive value x.
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