Standard Errors of Equating

Currently, standard errors of equating (SEE) are only available for random groups designs.

Random Groups

Standard errors of equating are calculated using mean_se() (mean equating) and linear_se() (linear equating). mean_se() has two arguments: formX and formY. Each are an array of raw scores on each form. linear_se() has the arguments of formX and formY in addition to an optional y_scores. The optional argument allows users to specify a range of scores to calculate the SEE for. If a range is not specified, the default is to use all unique values in form Y.

#Calculate SEE for mean equating
eq.mean_se(formx['x'], formy['x'])

#Calcualte SEE for linear equating
eq.linear_se(formx['x'], formy['x'])

	scores	SEE
0	0	24.569200
1	1	24.418938
2	3	24.120148
3	12	22.806451
4	13	22.663842
5	29	20.489828
6	32	20.107818
7	42	18.904412
8	47	18.347817
9	48	18.240467
10	59	17.156072
11	61	16.979445
12	70	16.272244
13	79	15.722191
14	80	15.671539
15	88	15.346193
16	95	15.182577
17	97	15.157208
18	104	15.144243
19	107	15.174830
20	110	15.226959
21	114	15.329581
22	116	15.394877
23	122	15.645254
24	131	16.166707
25	132	16.234864
26	134	16.377019
27	137	16.604475
28	151	17.872042
29	158	18.617992
30	161	18.957610
31	164	19.308283
32	166	19.547913
33	169	19.915709
34	177	20.941706
35	194	23.305733
36	197	23.744639