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Topic

Hypothesis Testing

1 pieceUpdated 29 October 2026

1 piece

Level

Everything in Hypothesis Testing

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Strictly necessary

Remembers your theme, the lessons you marked as done and this choice. It stays on your device, tracks nothing and cannot be switched off.

Always on
What exactly is collected, and why

Grokem’s own counts

Collects
The pages you open and how long you stay, how far you scroll, where you came from, your device type, browser, screen size, language and time zone. Your IP address is turned into a code that changes every day; it is never stored as it is.
Why
To see how long lessons are read and where readers leave. Not shared with anyone.
Stored
A random visitor ID, a visit ID and the time of your last page view in your browser’s storage (gr_vid, gr_sid, gr_last). No name or email is attached.
Hypothesis Testing | Grokem