00472nam a22001937a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093082001500102100002300117245004500140260003500185300001000220650002700230700002100257CHAP20220329134228.0971013s1956            r     00010     d  a17314  a18286  a22371  cCHAP  a310.83bJ600aJohnson, Robert E.  aGuide to elementary statistical formulas  aNew York :bMcGraw-Hill,c1956  a101 p14aEstadísticaxTablas.0 aMorris, Doris N.