Na'urar lissafin percentile na IQ
Shigar da makin IQ don ganin percentile ɗinsa, yadda yake da wuya, da kwatankwacinsa a wasu ma'aunan IQ.
Percentile
84.1
Sama da kashi 84.1% na mutane
Sama da matsakaici
Kusan mutum 1 cikin 6 ke samun wannan maki ko sama da shi
Teburin IQ zuwa percentile (SD 15)
| IQ | Percentile |
|---|---|
| 70 | 2.28 |
| 75 | 4.78 |
| 80 | 9.12 |
| 85 | 15.87 |
| 90 | 25.25 |
| 95 | 36.94 |
| 100 | 50 |
| 105 | 63.06 |
| 110 | 74.75 |
| 115 | 84.13 |
| 120 | 90.88 |
| 125 | 95.22 |
| 130 | 97.72 |
| 135 | 99.02 |
| 140 | 99.62 |
| 145 | 99.87 |
| 150 | 99.96 |
| 155 | 99.99 |
| 160 | 100 |
Yadda na'urar lissafin ke aiki
Makin IQ suna bin rarrabuwa ta al'ada (normal distribution) mai matsakaici na 100. Na'urar lissafin tana mayar da makinka zuwa z-score — karkacewar daidaito nawa ne yake nesa da 100 — sannan zuwa kason mutanen da ke ƙasa da shi.
Sakamakon shi ne percentile ɗaya da kowane gwajin IQ mai amfani da ma'auni iri ɗaya zai bayar.
Me ya sa ma'aunai suka bambanta
Ba kowane gwaji ke amfani da karkacewar daidaito iri ɗaya ba. Maki 132 a ma'auni mai SD 16 kusan daidai yake da 130 a ma'aunin SD 15 na yau da kullum, kuma 148 a ma'aunin Cattell (SD 24) shi ma kusan 130 ne.
Koyaushe ka duba wane ma'auni maki ke amfani da shi kafin ka kwatanta shi — musamman don sharuɗɗan ƙungiyoyin masu babban IQ, waɗanda yawanci ake bayarwa a matsayin percentile (sau da yawa na 98).
Iyakoki na gama-gari
- 100: matsakaici — percentile na 50.
- 115: karkacewar daidaito ɗaya sama da matsakaici — kusan percentile na 84.
- 130: karkacewar daidaito biyu sama da matsakaici — kusan percentile na 98.
- 145: karkacewar daidaito uku sama da matsakaici — kusan mutum 1 cikin 740.