-.25
-1.28
It is 1.281551
z = 1.281551
It is -0.6745 to 0.6745
The boundaries are ± 0.8416
-1.28
It is 1.281551
0.2533
A Z-Score of 0 separates the upper 50% of the area from the lower 50% of the area. A Z-Score of 0 is at the mean, median, and mode of the distribution.
z = 1.281551
It is -0.6745 to 0.6745
The boundaries are ± 0.8416
0.13
z = 0.8416
50 * * * * * z = -0.67449 to z = +0.67449
It is 84.3%
z = 1.75