keyword

3 sigma

Monthly search volume and cost-per-click data for "3 sigma" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=3+sigma&country=us" +--------------+------------------+ | volume | 1,600 | | cpc | $0 | | competition | 0.01 | | country | US | | updated | 2026-06-06 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
3 sigma standard deviation	1,600	$0	12/20
three sigma percentage	880	$0	13/20
three sigma	390	$0	14/20
what is 3 sigma	210	$0	16/20
3 sigma rules	210	$0	12/20
3-sigma probability	110	$0	12/20
3 sigma definition	40	$0	14/20
mean 3 sigma	40	$0	14/20
what does 3 sigma mean	40	$0	14/20
standard deviation 3 sigma	30	$0	13/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://api.seodata.dev/v1/keyword?q=3+sigma&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt