Does Carbon Really Work?

ओह! यह पोस्ट हिन्दी में उपलब्ध नही हैं।अंग्रेजी संस्करण के हेतु यहाँ क्लिक करे l

 

The Sqair air purifier Kickstarter

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nick

you say you did 4 tests of the control, why does the graph not indicate this? You should have confidence intervals plotted