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Both calculators run independently — change the inputs on either side to compare results.

Expected Value Calculator

Compute the expected value (mean) of a discrete probability distribution by entering up to three outcomes and their probabilities. Ideal for decision analysis, gambling odds, and statistics coursework.

Outcome 1 Value

Outcome 1 Probability

Outcome 2 Value

Outcome 2 Probability

Outcome 3 Value

Outcome 3 Probability

Fill in the required fields to see your result.

Probability

Chi-Square Test Calculator

Calculate the chi-square (χ²) test statistic and compare it against a critical value to test goodness of fit or independence. Used in research, biology, marketing, and quality control.

Observed Frequency 1

Expected Frequency 1

Observed Frequency 2

Expected Frequency 2

Fill in the required fields to see your result.

Key differences

	Expected Value Calculator	Chi-Square Test Calculator
Category	Probability	Probability
Inputs required	6	4
Result	Expected Value	Chi-Square Statistic
What it does	Compute the expected value (mean) of a discrete probability distribution by entering up to three outcomes and their probabilities. Ideal for decision analysis, gambling odds, and statistics coursework.	Calculate the chi-square (χ²) test statistic and compare it against a critical value to test goodness of fit or independence. Used in research, biology, marketing, and quality control.