normality 153 average worksheet experiment activity 2nd 160 percentile 180 OF 189 III documentation meeting observation test 177 score 171 normal distribution 109 151 138 liliefor clas value 191 126 under answer APPENDIX 167 student page deviation 192 learning research data 184 control list 115 instrument critical 169 appendix homogeneity key plan 190 LIST area post curve 172 121 1st lattice 149 173 standard 3rd 134 calculation lesson pre hypothesi II