Z Score -2.78

We looked up the Z Score for -2.78 in our Normal Distribution Tables with Z Scores so you don't have to!

First, note that a Z Score of -2.78 means that your statistic is -2.78 standard deviation to the left of the mean on a bell curve. Here is a Bell Curve so you can visualize where -2.78 is on a bell curve.

We used three different distribution tables, and we will give you the -2.78 Z Score probability, percentile, and explanations for all three.

Cumulative from mean
This gives you the probability of the area from the mean to your Z Score. The cumulative from-mean probability and percentile for a -2.78 Z score is displayed here:

0.497282055077299
= 49.7282%

Cumulative
This gives you the probability of the area below the Z Score. The cumulative probability and percentile for a -2.78 Z score is displayed here:

0.00271794492270128
= 0.2718%

Complementary cumulative
This gives you the probability of the area above the Z Score. The complementary cumulative probability and percentile for a -2.78 Z Score is displayed here:

0.997282055077299
= 99.7282%

Z Score Table Lookup
Here you can submit Z Scores between -3.999 and 3.999 for us to look up in our Normal Distribution Tables.

Z Score -2.779
Here is the next Z Score we looked up in our Normal Distribution Tables.

The percentiles on this page are rounded to the nearest 4 decimals.