ƒ(t)
T-Test Calculator (One & Two Sample)
One-sample, two-sample (independent), and paired t-tests. Returns t-statistic, df, and two-tailed p-value.
MATHOne-sample, two-sample (independent), and paired t-tests. Returns t-statistic, df, and two-tailed p-value.
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
Disclaimer: Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
T-Test Calculator
One-sample t-test (vs hypothesized mean) or Welch's two-sample t-test (independent samples). Returns t-statistic, df, and two-tailed p-value.
t = 1.7321
p = 6.170e-3
Degrees of freedom5.00
Sample 1 mean5.4000
Decision at α = 0.05Reject H₀
Approximation via Cornish-Fisher. For exact p-values use R, Python (scipy.stats), or a t-table. T-test assumes approximate normality (robust for n ≥ 30 by CLT).
Frequently Asked Questions
What is the T-Test Calculator (One & Two Sample) for?
One-sample, two-sample (independent), and paired t-tests. Returns t-statistic, df, and two-tailed p-value.
How do I use the T-Test Calculator (One & Two Sample)?
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
How accurate are my t-test (one & two sample) results?
Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
Is the T-Test Calculator (One & Two Sample) free to use?
Yes - every calculator on WhichCalc is completely free with no signup, no usage limits, and no tracking on the calculation itself. Results display instantly in your browser and your inputs are never sent to a server. Bookmark the page if you use this calculator regularly.