Question

Determine the probability of a z-score to the right of a z-score of -1.25. P\left(z>-1.25\right)P(z>−1.25)

Answer 1

0.894

Explanation:

This would be the area under the standard normal curve to the right of z = -1.25. There are various ways in which we can calculate this area. I will use a TI-83Plus calculator, which features the necessary normalcdf( function:

normalcdf(-1.25, 1000) = 0.894

So: the area under the standard normal curve to the right of z = -1.25 is 0.894. This area also represents the desired probability.