What is the area under the normal curve between z -1.0 and z -2.0?

The area under the normal curve between z = -1.0 and z = -2.0 can be found using the standard normal distribution table or a calculator. The area corresponds to the probability of a z-score falling within that range. For z = -1.0, the cumulative probability is approximately 0.1587, and for z = -2.0, it is about 0.0228. Therefore, the area between these two z-scores is approximately 0.1587 - 0.0228 = 0.1359, or 13.59%.