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01
Descriptive
02
Normal
03
Confidence interval
04
Sample size
05
t-test
06
Chi-square
07
Correlation
08
Probability
t-test calculator: one-sample, two independent samples, paired
A
Input
One-sample
Independent
Paired
Raw data
Summary values
Data
5.1, 4.9, 5.6, 5.8, 6.0, 5.3, 4.7, 5.5, 5.9, 6.2
Sample mean
Sample standard deviation
Sample size n
Hypothesized mean μ₀
Group 1
5.1, 4.9, 5.6, 5.8, 6.0, 5.3, 4.7, 5.5, 5.9, 6.2
Group 2
4.8, 4.5, 5.0, 5.9, 5.2, 4.9, 4.4, 5.1, 5.3, 5.6, 4.0, 4.6
Group 1
Sample mean
Sample standard deviation
Sample size n
Group 2
Sample mean
Sample standard deviation
Sample size n
Variance assumption
Welch (unequal variances · recommended)
Student (equal variances · pooled)
Before (1st measurement)
72, 80, 65, 90, 77, 84, 69, 75
After (2nd measurement)
75, 83, 66, 94, 76, 88, 73, 80
Alternative hypothesis
Two-sided (≠)
Left-tailed (<)
Right-tailed (>)
Confidence level
80%
90%
95%
98%
99%
99.9%
Significance level α
0.10
0.05
0.01
0.001
R
Result
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Related:
Interpreting p-Values: The Definition and 5 Common Misconceptions
Which Statistical Test Should You Use? A Practical Selection Guide
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