Standard Deviation
About TQ Tech
TQ Tech publishes Standard Deviation Calculator for Android (package tq.tech.standarddeviation). This site is the official product website for that app.
What we ship
The app is a calculator for sample and population standard deviation. It shows the working (mean, deviations, variance, square root), graphs the list, and stores recent calculations on the device. It is not a generative homework solver and it is not medical or professional statistical advice.
How we write this site
Guides follow the same formulas used in the app. We do not invent ratings, download counts, awards, or competitor scores. Where a Google Play listing field is not public yet, we say so instead of guessing.
Contact
Email tqtechofficial@gmail.com for privacy questions, billing restore issues (after you have used Play’s restore), or corrections to these pages.