Reliabilitas sebelum seleksi aitem

Scale Statistics Mean Variance Std. Deviation N of Items 89.7400 292.523 17.10330 21 VAR00008 84.7800 262.012 .609 .824 VAR00009 85.4800 253.887 .534 .825 VAR00010 85.1400 244.449 .782 .813 VAR00011 85.2800 257.512 .666 .821 VAR00012 86.5200 294.500 -.083 .852 VAR00013 84.8800 269.006 .428 .831 VAR00014 84.9200 270.075 .436 .831 VAR00015 86.0200 254.673 .570 .823 VAR00016 85.2600 260.482 .489 .828 VAR00017 85.3000 259.847 .524 .826 VAR00018 85.7400 274.482 .228 .840 VAR00019 85.8600 269.470 .425 .831 VAR00020 84.9800 258.918 .627 .823 VAR00021 85.8400 271.484 .290 .837

b. Reliabilitas setelah seleksi aitem

Case Processing Summary N Cases Valid 50 100.0 Excluded a .0 Total 50 100.0 a. Listwise deletion based on all variables in the procedure. Reliability Statistics Cronbachs Alpha N of Items .867 19 Item Statistics Mean Std. Deviation N VAR00001 5.0400 1.17734 50 VAR00002 4.0200 1.76693 50 VAR00003 3.6800 1.91066 50 VAR00004 4.7000 1.40335 50 VAR00005 4.3200 1.92131 50 VAR00007 5.1200 1.49339 50 VAR00008 4.9600 1.44222 50 VAR00009 4.2600 2.02847 50 VAR00010 4.6000 1.82946 50 VAR00011 4.4600 1.52810 50 VAR00013 4.8600 1.51199 50 VAR00014 4.8200 1.42414 50 VAR00015 3.7200 1.88485 50 VAR00016 4.4800 1.82097 50 VAR00017 4.4400 1.75150 50 VAR00018 4.0000 1.90595 50 VAR00019 3.8800 1.49339 50 VAR00020 4.7600 1.54603 50 VAR00021 3.9000 1.84336 50 Item-Total Statistics Scale Mean if Item Deleted Scale Variance if Item Deleted Corrected Item-Total Correlation Cronbachs Alpha if Item Deleted VAR00001 78.9800 283.122 .438 .863 VAR00002 80.0000 279.714 .322 .867 VAR00003 80.3400 282.923 .238 .871 VAR00004 79.3200 276.181 .508 .860 VAR00005 79.7000 277.153 .328 .867 VAR00007 78.9000 271.684 .568 .858 VAR00008 79.0600 271.323 .599 .857 VAR00009 79.7600 261.329 .555 .857 VAR00010 79.4200 252.371 .794 .847 VAR00011 79.5600 266.129 .670 .854 VAR00013 79.1600 276.994 .449 .862 VAR00014 79.2000 277.878 .462 .861 VAR00015 80.3000 263.480 .569 .857 VAR00016 79.5400 268.253 .508 .859 VAR00017 79.5800 267.840 .540 .858 VAR00018 80.0200 283.530 .229 .871 VAR00019 80.1400 278.327 .427 .863 VAR00020 79.2600 268.196 .618 .856 VAR00021 80.1200 278.965 .317 .867 Scale Statistics Mean Variance Std. Deviation N of Items 84.0200 301.857 17.37402 19