The average time it takes a STA210 students to complete a test is 46.2 minutes. The standard deviation is 8 minutes. Assume the variable is normally distributed. a. Find the probability that a...


The average time it takes a STA210 students to complete a test is 46.2 minutes. The standard deviation is 8 minutes. Assume the variable is normally distributed.


a. Find the probability that a randomly selected student will complete the test in less than 49 minutes.

b. Find the probability that a randomly selected student will complete the test in more than 50 minutes.

c. Find the probability that a randomly selected student will complete the test in a time between 44 and 49 minutes.

d. Find the probability that if 50 randomly selected adults take the test, the mean time it takes the group to complete the test will be less than 43 minutes.


Jun 08, 2022
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