{"product_id":"quadrell-the-quadrature-scribe-mug","title":"Quadrell, the Quadrature Scribe Mug","description":"\u003cp\u003eIndependent uncertainties combine in quadrature: σ² = Σ (∂f\/∂x\u003csub\u003ei\u003c\/sub\u003e)² σ\u003csub\u003ei\u003c\/sub\u003e². Correlated ones do not.\u003c\/p\u003e\n\u003cp\u003eThe joke: Independent errors partially cancel; correlated grad-student problems add linearly. The slogan on the mug reads \u003cstrong\u003eERRORS ADD IN QUADRATURE. PROBLEMS DON'T.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: JCGM 100:2008 (GUM), §5.1 and §5.2, BIPM.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"11oz","offer_id":50976117358695,"sku":"24435810487184890707","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/16478020148892836555_2048.jpg?v=1793683554","url":"https:\/\/pixelatedphysics.com\/id\/products\/quadrell-the-quadrature-scribe-mug","provider":"Pixelated Physics","version":"1.0","type":"link"}