An introduction to the theory of mental and social measurements / by Edward L. Thorndike.
- Edward Thorndike
- Date:
- 1904
Licence: In copyright
Credit: An introduction to the theory of mental and social measurements / by Edward L. Thorndike. Source: Wellcome Collection.
98/232 page 82
![n = 315 + 120 + 531, i. e., n = 966, mode = 28, i. e., 27.5 to 28.5, = 531 + 60, i. e., = 591, = 315 60, e., = 375, 295.5, Jn, = 187.5. Points reached in counting in 295.5 from 42 and 187.5 from|21 are 31.5 - [(24.5/80) X 1] and 25.5 + [(64.5/92) x 1]. These are 31.2 and 26.2. are less than 3.2 distant from the mode. Jn, 1.8 Problems. 16. Calculate the average and the A. D. and (t from it in each of the following cases ; also the median and 25 and 75 percentiles. Obtain results accurate within .5 the unit. Case I. Case II. Case III. Quantity, Frequency. Quantity, 11.00 2 140 up to 144 12.00 1 144 U 148 13.00 4 148 U 152 14.00 9 152 iC 156 15.00 21 156 160 16.00 11 160 a 164 17.00 6 164 i( 168 18.00 1 168 i c 172 19.00 1 172 a 176 176 u 180 180 u 184 Frequency, Quantity, Frequency 1 3 up to 4 1 1 4 u 5 3 4 5 u 6 1 7 6 ii 7 3 13 7 i c 8 4 20 8 u 9 4 22 9 u ]0 10 15 10 C ( 11 13 5 11 u 12 13 2 12 u 13 18 2 13 u 14 16 14 u 15 9 15 cc 16 15 16 u 17 20 17 u 18 10 18 u 19 6 19 u 20 7 20 u 21 3 21 u 22 1 22 C i 23 2 23 iC 24 2 24 a 25 o 25 a 26 0 26 i i 27 o 17. In each of the following cases, calculate the average and the A. D., (T and P. E. from it; the median and the A. D., (t and P. E from it. Accuracy to .5 the unit.](https://iiif.wellcomecollection.org/image/b28082370_0098.jp2/full/800%2C/0/default.jpg)
