NPRA36-S

NPRA36 Statistics

Last Revision : January 1st, 2018.

1. 2nd Norm

Raw Score IQ (sd15) Rarity (1/x) Raw Score IQ (sd15) Rarity (1/x)
9 <=128  32 23 153 4,873
10 130 44 24 155 8,137
11 131 52 25 157 13,817
12 133 72 26 159 23,863
13 134 85 27 161 41,916
14 135 102 28 163 74,883
15 137 147 29 165 136,074
16 139 215 30 167 251,515
17 141 319 31 169 472,893
18 143  482 32 172 1,258,887
19 145 741 33 175 3,483,046
20 147 1,157 34 178 10,016,587
21 149 1,838 35 184 93,056,001
22 151 2,968 36 190 1,009,976,678

2. Histogram
histogram2ndnpra36

3. Statistical Properties & Correlations with other tests
Calculated mean on reported scores on standard supervised tests is 140.4 sd15 (N=10). Mean raw score of this sample on NPRA36 is 17.5.

Parameter Value Test Score Pairs (n) r
Mean 19.936 Standard* 10 0.809
Median 20 WAIS  4 0.985
Stand. Deviation 6.452 RAPM 4 0.787
Variance 41.634 Jouve** 16 0.889
SEM 0.951 JCTI 4 0.997
Kurtosis 0.258 C-09 3 0.999
Skewness -0.244 C-10 3 0,913
Cronbach’s a 0.896  –  –

* Tests used : WAIS, RAPM, FRT-B, Unknown Mensa Entrance Test.
** Tests used : JCTI, NVCPE-R, CSE, TLAP-R, C-09, C-10, JCCES.

4. Notes
To sum up, NPRA36 shows excellent correlation with standard supervised IQ tests (r=0.809) and reliability (Cronbach’s alpha=0.896), a fact that makes it a reliable tool for estimating one’s intelligence quotient. In addition, due its high difficulty (a raw score of 11/36 is theoretically enough for joining Mensa), test’s structure provides enough space for thorough IQ estimation, without leaving large gaps within the norm. Next norm (3rd) will be generated after a total of 75 submissions.

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