Lemma
MediumNormal distribution
OpenStax, Statistics §6.1 The Standard Normal Distribution · Exercise 34 · Statistics · Normal distribution

The Standard Normal Distribution · Exercise 34

Suppose X ~ N(15, 3). Between what x values does 68.27 percent of the data lie? The range of x values is centered at the mean of the distribution (i.e., 15).

Its source prints no answer for this problem, so there's nothing to check against.

~8 minWritten answer · check your work with Lemma

OpenStax, Statistics · §6.1 The Standard Normal Distribution · Exercise 34

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Attach photos of your pages (up to 3) or one PDF — or check what you typed above. Lemma reads the work and verifies the reasoning, not just the answer.

Your first check today doesn't need an account.

Your photos and PDFs are read once and not stored — only the transcription is kept.