The average length of time required to complete a college achievement test was found to equal 70 minutes, with a standard deviation of 12 minutes. (Assume that the time required to complete the test...

The average length of time required to complete a college achievement test

was found to equal 70 minutes, with a standard deviation of 12 minutes.

(Assume that the time required to complete the test is normally

distributed)

a) Define the variable normally distributed.
?:
~ > ?(___________,____________)
b) In how much time will the fastest 10% of the students will terminate?

We wanted to corroborate this assertion. We took a sample of 35 students

and they completed the test with an average time of 72 minutes.

c) Write the sampling distribution?
?̅:
~ > ?(___________,____________)
because:
d) If the assertion is right, what is the probability to get your mean (72

minutes) or less as an average time? Justify