Z Score -1.287

We looked up the Z Score for -1.287 in our Normal Distribution Tables with Z Scores so you don't have to!

First, note that a Z Score of -1.287 means that your statistic is -1.287 standard deviation to the left of the mean on a bell curve. Here is a Bell Curve so you can visualize where -1.287 is on a bell curve.

We used three different distribution tables, and we will give you the -1.287 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 -1.287 Z score is displayed here:

0.400952855930373
= 40.0953%

Cumulative
This gives you the probability of the area below the Z Score. The cumulative probability and percentile for a -1.287 Z score is displayed here:

0.0990471440696272
= 9.9047%

Complementary cumulative
This gives you the probability of the area above the Z Score. The complementary cumulative probability and percentile for a -1.287 Z Score is displayed here:

0.900952855930373
= 90.0953%

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 -1.286
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.