Dab tsi yog chav kawm ib ntus hauv kev txheeb cais?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Mathematically nws txhais tau tias yog qhov sib txawv ntawm sab sauv chav kawm txwv thiab qis chav kawm txwv. Chav Kawm Interval = Upper Chav kawm txwv – qis chav kawm txwv. Hauv txheeb cais , cov ntaub ntawv yog teem rau txawv chav kawm thiab qhov dav ntawm xws li chav kawm hu ua chav kawm ncua.

Ib yam li ntawd, tib neeg nug, ua li cas koj pom lub sijhawm kawm hauv kev txheeb cais?

xam tus chav kawm ncua siv cov hauv qab no qauv : Chav kawm ntu ntu = range ÷ tus naj npawb ntawm chav kawm . Yog tias koj muaj 15 chav kawm ntawm cov nyiaj tau los hauv kev faib cov nyiaj tau los piv txwv, ua haujlwm tawm 30 ÷ 15 = $ 2 billion. Feem ntau, cov neeg txheeb cais tsis quav ntsej cov lej siab thiab qis thiab tsom mus rau qhov nruab nrab zaus.

Qhov thib ob, lub sijhawm ntawm chav kawm yog dab tsi? Chav Kawm Intervals Qhov zaus ntawm a chav kawm ncua yog cov tus lej ntawm cov ntaub ntawv muaj nuj nqis uas poob rau hauv qhov ntau teev los ntawm cov lub sijhawm . Qhov loj ntawm lub chav kawm ncua feem ntau xaiv li 5, 10, 15 lossis 20 thiab lwm yam. Txhua chav kawm ncua pib ntawm tus nqi uas yog ntau yam ntawm qhov loj.

Tom qab ntawd, qhov piv txwv ntawm chav kawm yog dab tsi?

Chav kawm ntu ntu . Qhov ntau ntawm txhua pawg ntawm cov ntaub ntawv. Piv txwv : koj ntsuas qhov ntev ntawm nplooj ntawm ib tug rose Bush. Qee qhov qis dua 1 cm, thiab qhov ntev tshaj yog 9 cm.

Dab tsi yog class interval nyob rau hauv zaus faib?

Chav kawm ntu ntu Cov zaus ntawm a chav kawm ncua yog tus naj npawb ntawm kev soj ntsuam uas tshwm sim nyob rau hauv ib qho tshwj xeeb predefined lub sijhawm . Yog li, piv txwv li, yog tias 20 tus neeg muaj hnub nyoog 5 txog 9 xyoo tshwm hauv peb cov ntaub ntawv tshawb fawb, cov zaus rau 5-9 lub sijhawm yog 20.