00274nam a2200121Ia 4500082002100000100001600021245004100037250000800078260004100086300001500127500000500142700000500147  a300.183bH425.SS  aHays, W. L.  aStatistics for the social sciencesb  a2nd  aNew YorkbRinehart and Winstonc1973  axxi, 954p.  a  a