The probability that z is greater than - 1.8

0.964

Step-by-step explanation:

It's easier to approach this problem if you find the prob. that z is less than - 1.8 and then subtract your result from 1.00.

The prob. that z is less than - 1.8 can be found using any calculator with probability and statistic functions.

The prob. that z is less than - 1.8 = normcdf (-100,-8) = 0.036. Here "cdf" stands for "cumulative probability density function)," - 100 is far to the left of z = - 1.8, and the result (0.036) is the area under the standard normal probability density curve to the left of z = - 1.8.

Finally, subtract this 0.036 from 1.000, obtaining 0.964. This is the probability that z is greater than - 1.8.