A normal population has mean 100 and variance 25. How large must the random sample be if you want the standard error of the sample average to be 1.8? Round your answer to an integer.

If Φ(z) = 0.9099, what is the value of z. Round your answer to 2 decimal places. ________                   For example, you answer can be 0.56 or -1.12  

For the scenario below, list TWO parts of the brain being used and explain how it is being used in the scenario Ichiro was playing baseball in left field for the Mariners.  A ball was hit deep to the outfield and Ichiro started to run back to track the ball down.  He realized it could be a homerun and that would put the Oakland A’s ahead going into the 9th inning.  So he leaped up the wall and made the catch.  The Mariners won the game thanks to the smart play by Ichiro.  

If Φ(z) = 0.9744, what is the value of z. Round your answer to 2 decimal places. ________                   For example, you answer can be 0.56 or -1.12            

A normal population has mean 100  and variance 25. How large must the random sample be if you want the standard error of the sample average to be 1.5? Round your answer to an integer

Find the value of t.005,10 Round your answer to 3 decimal places.  

The time between service requests to an electrical repair shop is exponentially distributed with a mean time of 20 minutes.Find the probability that no requests arrive within a 30-minute interval.Round your answer to 4 decimal places.

Determine the value of k such that the function f(x,y) = kx2y for 0

Find the value of t.025,10 Round your answer to 3 decimal places.    

Find P(x = 75 , y