Z-Test Calculator

Perform a one-sample Z-test to compare a sample mean to a population mean.

Sample Mean (x̄)

Population Mean (μ)

Hypothesized mean

Population SD (σ)

Sample Size (n)

Significance Level (α)

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Z-Statistic

0

p-value = 0

No Significant Difference

Since p >= 0.05, we fail to reject the null hypothesis. There is not enough evidence to say the means are different.

Sample Mean105

Population Mean100

Two-Tailed P-Value

Standard test

One-Tailed P-Value

Directional test

Documentation

Z-Test Formula

Z Statistic

Frequently Asked Questions