z=+1.0 and z=+2.3

Question

Help me solve this problem please.

Answer 1

These z-scores correspond to  0.8413 or 84.13% and 0.9893 or 98.93% respectively.

These mean that in a normal distribution of data in a dataset, a particular datum is one standard deviation above the mean (z=+1.0) or 2.3 standard deviations above the mean (z=+2.3).