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Statistical Calculator
Z-Table, T-table, Chi-squared table, C4 table

Much faster and more accurate than looking it up in a book!
Great for homework or an online statistics class. So easy it's almost cheating!
Table 1: Standard normal distribution (z)
Table 2: Student's t-distribution (t)

Table 3: Chi-squared distribution (c2)
Table 4: C4 table (text)

Table 5: F-table P=0.001, F-table P=0.01, F-table P=0.05.

Table 1: Standard Normal Distribution

Left tail Right tail Middle Two-tail

z value
probability

Table 2: Student's t-Distribution

Left tail Right tail Middle Two-tail

d.f.
t value
probability

Table 3: Chi-Squared (c2) Distribution

Left tail Right tail

d.f.
c2 value
probability

Table 4: Values of the c4 constant for x-bar charts

The value of c4 for subgroup size n is shown below.

n2345678910
c40.7800.8860.9210.9400.9520.9590.9650.9690.973