@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix edu: <https://knobit.org/def/> .
@prefix knobit: <https://knobit.org/id/knobit/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix register: <https://knobit.org/id/register/> .
@prefix schema: <https://schema.org/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

knobit:Q-1901 a edu:Knobit ;
    rdfs:label "Explains a pooled rate as the weighted mean of its population rates"@en ;
    dcterms:identifier "Q-1901",
        "W-1901" ;
    dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
    dcterms:source "Part B candidate of k12-dmbok for activity QO-4 (a need for school knowledge no knobit of the activity reached), accepted by Peep Küngas on 31 Oct 2026"@en,
        "Shared-URI copy of data-quality Q-1901, for activity WO-2 (k12-dmbok part B candidate, accepted by Peep Küngas on 31 Oct 2026)"@en ;
    skos:definition "A rate over several populations is the mean of their rates weighted by their sizes (denominators), not their plain average; a small poor population can hide in it, and a shift in the population mix moves it with no change in any population's quality."@en ;
    skos:prefLabel "Explains a pooled rate as the weighted mean of its population rates"@en ;
    edu:actionVerb "Explains"@en ;
    edu:assessmentCriterion "Computes a pooled rate from population rates and sizes, tells it from the plain mean of the rates, and names the mix effect"@en ;
    edu:assessmentMethod "Multiple-choice question"@en ;
    edu:contextFunction <https://knobit.org/def/contextFunction/objectUnderstanding> ;
    edu:creationMethod <https://knobit.org/def/creationMethod/aiGenerated>,
        <https://knobit.org/def/creationMethod/aiGeneratedAiEdited> ;
    edu:dependsOnKnobit knobit:K12-2087 ;
    edu:expectedResult "The pooled rate as the size-weighted mean of the population rates, with the mix effect it can hide"@en ;
    edu:graphRelevance <https://knobit.org/def/graphRelevance/learnerState>,
        <https://knobit.org/def/graphRelevance/outcomeContent> ;
    edu:knobitType <https://knobit.org/def/knobitType/knowledge> ;
    edu:targetObject "pooled rate over several populations"@en ;
    schema:creativeWorkStatus "accepted" ;
    schema:isPartOf register:data-quality,
        register:dw-bi .

edu:Knobit rdfs:label "Knobit"@en,
        "Knobit"@et .

knobit:K12-2087 rdfs:label "Explains the concept of the arithmetic mean"@en,
        "Selgitab aritmeetilise keskmise mõistet"@et .