Q‑Test Calculator using Means, Sample Sizes, and Standard Deviation

Q‑Test Calculator

Enter the group means, sample sizes, and standard deviation to compute the Q‑test statistic.

Formula: $ Q = \frac{\text{Mean}_1 – \text{Mean}_2}{\text{SD} \times \sqrt{\frac{1}{n_1} + \frac{1}{n_2}}} $

Step 1: Enter Parameters

Mean 1:

e.g., 75

Mean 2:

e.g., 70

Sample Size 1 (n₁):

e.g., 30

Sample Size 2 (n₂):

e.g., 30

Standard Deviation (SD):

e.g., 10

The Q‑test statistic is computed as:

$$ Q = \frac{\text{Mean}_1 – \text{Mean}_2}{\text{SD} \times \sqrt{\frac{1}{n_1} + \frac{1}{n_2}}} $$