31:[] 2f:{"title":"Samplingfördelning - leksakspopulation","cells":[{"id":38,"value":"# Samplingfördelning - leksakspopulation","pinned":false,"hidden":false,"mode":"md"},{"id":118,"value":"viewof N = Inputs.range([2, 7], {value: 4, step: 1, label: tex`\\text{Pop.storlek: }N`})\n ","pinned":false,"hidden":false,"mode":"ojs"},{"id":1071,"value":"viewof n = Inputs.range([1, N], {value: 2, step: 1, label: tex`\\text{Urvalsstorlek: }n`})\n ","pinned":false,"hidden":false,"mode":"ojs"},{"id":1068,"value":"texter = html`

Population: [${[pop]}] med medelvärde ${d3.mean(pop).toPrecision(5)}
\nDet finns totalt ${tex`\\binom{${N}}{${n}}=`} ${mathjs.combinations(N, n)} möjliga stickprov av storlek n=${n}.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":1011,"value":"samples_table = Inputs.table(data, {\n width: {\n nr: 50,\n stickprov: 100,\n medelvärde: 100,\n },\n header: {\n nr: \"Stickprov\",\n stickprov: \"Urval\",\n medelvärde: \"Medelvärde\"\n },\n align: {\n nr: \"left\",\n stickprov: \"left\",\n medelvärde: \"left\"\n },\n maxWidth: 500,\n layout: \"fixed\"\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":961,"value":"histoplot = Plot.plot({\n x: {\n label: \"medelvärde stickprovet\",\n domain: [0, 100],\n ticks: [10,20,30,40,50,60,70,80,90,100, d3.mean(pop)]\n },\n y: {\n axis: true,\n //domain: [0, 1],\n },\n marks: [\n Plot.rectY(data, Plot.binX({y: \"count\"}, {x: \"medelvärde\", fill: \"orange\", opacity: 0.6, thresholds: \"sturges\"})),\n Plot.ruleY([0]),\n Plot.ruleX([d3.mean(pop)],{stroke: \"steelblue\", strokeWidth: 2, }),\n //Plot.text([{x: d3.mean(pop), y: 0.3}], {x: \"x\", y: \"y\", text: d => \"pop.medel\", dy:30, fontSize:15})\n ]\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":109,"value":"
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\n\n---\n## 🙈 Appendix 🙈\n\nHär följer bara kod och detaljer som du antagligen inte vill läsa.","pinned":false,"hidden":false,"mode":"md"},{"id":221,"value":"#### Imports","pinned":false,"hidden":false,"mode":"md"},{"id":26,"value":"jstat = require('jstat')","pinned":false,"hidden":false,"mode":"ojs"},{"id":1128,"value":"mathjs = require('mathjs')","pinned":false,"hidden":false,"mode":"ojs"},{"id":761,"value":"import {Plot} from \"@mkfreeman/plot-tooltip\"","pinned":false,"hidden":false,"mode":"ojs"},{"id":895,"value":"import {range, sorted, permutations} from '@jrus/itertools'","pinned":true,"hidden":false,"mode":"ojs"},{"id":888,"value":"#### Functions","pinned":false,"hidden":false,"mode":"md"},{"id":893,"value":"combinations = function* combinations(iterable, r) {\n const pool = [...iterable], n = pool.length;\n for (let indices of permutations(range(n), r))\n if (sorted(indices).join() == indices.join())\n yield indices.map(i => pool[i]); }","pinned":true,"hidden":false,"mode":"ojs"},{"id":903,"value":"function allcombinations(xarray, k){\n const allcomb = [...combinations(xarray,k)]\n const data = allcomb.map( (d,i) => ({nr: i+1, stickprov: d, medelvärde: d3.mean(d)} ) );\n return data\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":223,"value":"#### Data","pinned":false,"hidden":false,"mode":"md"},{"id":1028,"value":"pop = d3.range(N).map(d => Math.round(jstat.uniform.sample( 1, 100 ).toFixed(2)))","pinned":false,"hidden":false,"mode":"ojs"},{"id":1046,"value":"data = allcombinations(pop, n)","pinned":false,"hidden":false,"mode":"ojs"},{"id":229,"value":"#### Style","pinned":false,"hidden":false,"mode":"md"},{"id":202,"value":"","pinned":false,"hidden":false,"mode":"html"},{"id":58,"value":"viewof md_colour = Inputs.color({label: \"Highlight color cells\", value: \"#F5F5DC\"})","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}