Enter an observation with the mean and standard deviation of its population. Gives the Z-score, where it lands on the bell curve, its percentile rank, the tail probabilities either side of it, and how rare a reading that far out actually is.
Z-Score
+1.0000
70 is 1.00σ above a mean of 60
Where It Lands (shaded area = P(X < 70) = 84.13%)
Percentile
84.13%
of the population is lower
P(X < x)
0.841345
left tail
P(X > x)
0.158655
right tail
Rarity
1 in 3
this far out, either side
Reading
Between 1 and 2 standard deviations from the mean
-3σ
30
-2σ
40
-1σ
50
0σ
60
+1σ
70
+2σ
80
+3σ
90
The highlighted band is the σ step your value rounds to.
marduc812
© 202620260824_1c411cc