文件:IQ curve.svg

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總結

Mièu-sŭk Current IQ tests typically have standard scores such that the mean score is 100 with each standard deviation from the mean counting for 15 IQ points.[1] The plot shows, assuming that such scores have a normal distribution, the percentage of people getting a score versus the score itself, from 55 to 145 IQ, that is over a span of six standard deviations. Spans are represented with different colors for each standard deviation above or below the mean. The plot was created with the following gnuplot code:
SVG開發
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SVG檔案的原始碼通過W3C驗證
 
向量圖形使用Gnuplot創作。
 
這個SVG 檔案使用了內置文字,可以輕鬆翻譯
Nguòng-dâi-mā
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Gnuplot code

set terminal svg name 'IQ_curve' size 600,480 font ',10' rounded
set output 'IQ_curve.svg'

mu    = 100.0
sigma = 15.0
from  = 55
to    = 145

# Normal distribution:
# (continuos normalization approximation, good to ~10 digits in this case)
P(x) = exp(-(x - mu)**2 / (2 * sigma**2)) / (sqrt(2 * pi) * sigma) * 100
# By sigma intervals:
oddsi(x) = (int(abs(x - mu) / sigma) % 2) ^ (x < mu)
Pm(x) =               (x == mu)  ? P(x) : 1/0 # sample at mu
Po(x) = ( oddsi(x) && (x != mu)) ? P(x) : 1/0 # samples in odd sigma intervals
Pe(x) = (!oddsi(x) && (x != mu)) ? P(x) : 1/0 # samples in even sigma intervals

set key off
set border 3
set xlabel 'IQ'
set xtics 10 out nomirror
set mxtics 2
set ylabel 'Population, %'
set ytics 1 out nomirror
set mytics 2
set samples (to - from + 1)
set style function impulses
plot [x = from:to] \
 Pm(x) lw 2, \
 Po(x) lw 2, \
 Pe(x) lw 2
Nĭk-gĭ
Lài-nguòng Cê-gă cáuk-pīng
Cáuk-ciā Alessio Damato, Mikhail Ryazanov
  1. Kaufman, A.S. (2009年) 《 IQ Testing 101》, New York (NY): Springer Publishing, pp. 104−109 ISBN978-0-8261-0629-2.

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已新增授權條款標題至此檔案,作為GFDL授權更新的一部份。
w:zh:創用CC
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Nṳ̄ â̤-sāi cê̤ṳ-iù:
  • hŭng-hiōng – Hók-cié, huák-buó, diòng-bó̤ buōng cáuk-pīng
  • tṳ̀ng-sĭng siŭ-gāi – gāi-biĕng cáuk-pīng
Nâ diŏh áng ī-hâ gì dèu-giông:
  • biĕu-sê miàng-sáng – 您必須指名出正確的製作者,和提供授權條款的連結,以及表示是否有對內容上做出變更。您可以用任何合理的方式來行動,但不得以任何方式表明授權條款是對您許可或是由您所使用。
  • dùng-iông huŏng-sék hŭng-hiōng – Lí nā kái-tōng, piàn-khoán, he̍k-chiá kun-kù pún chok chhòng-chō, lí kaⁿ-taⁿ ē-tàng ēng kap pún chok kâng-khoán he̍k-chiá saⁿ-chhiūⁿ ê hí-khó lâi hoat-pò͘ chò--chhut-lâi ê chok-phín.
Nṳ̄ buóh dĭk sié-nó̤h sêu-guòng dèu-kuāng dŭ kō̤-ī gēng.

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檔案來源 Chinese (Taiwan) (已轉換拼寫)

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