Question

Determine the percent of data greater than z = -1.60 in a normal distribution. Round your answer to the nearest hundredth. Use a standard normal table if necessary.

Answer 1

So you take the normal curve f(x) = e^(-x^2/2) / sqrt(2*pi), and you integrate it from -1.6 to infinity. Of course you will need to approximate this using a graphing calculator.

Answer 2

All you do is looking up the standard normal table to find z = -1.6 => Percentage!