Letbe astandard normal random variable. Use the ca December 28, 2016 By Essaypros Letbe astandard normal random variable. Use the calculator provided to determine the value of such that P(Z>c)=0.2578 Round your answer to at least two decimal places. We Deliver Top Quality On Time As Promised! Ready to get started? Just click the button to be directed to a secure page so you can enter the details of your paper.