2.1 随机抽样（练案二）-2020年高中同步教与学数学(人教B版必修3)

书书书 !"# ! $ ! % !!" ! !"#$ !!"!" ! %&!"#$ ! " '( " " !"# " ! $%&'()*+, !!!!!!!!!!!!!!!!!! "# !"#$%&'( ! )*+',-&. " !! # $! /0 %! 1/0 &! 123 '! 4'5-6789 (! ':;<2=(>?@A-9BC " !! # $! D: ! %! EFGH ! &! IJ'5 ! '! '51KL )# M *+ )NO<%&'5 "+ )PQRS ! TU*)7V !! !! ! (>WXV !!!! ! ,# YZ[\-<]^_C` " ! )- )^_< ! ab . )^_c deT23<]fg ! hiM )- )a . )^-'(j; C ! " !"# ! ! &-./$%01. *# 9"#$%&'( ! klm;<1n2-C " !! # $! oU*<)*71pq ! rstu#$%&'( %! tu#$%&'(1.Nvwx?@Ay &! u%&7@;'5(>q ! z7-j{rs{| ! }rs{ ~ $ {k ! {�00 '! ':;'5(>!�))*cm�C��- -# u#$%&'(M�8 - ))*-U*<'5J)WXV ) -(> ! )* ! +',-r�AC " !! # $! " - !!! %! " ) !!! &! " ( !!! '! 123 .! V��������� ! ��� -*+ ��v-�� ! M<'5 � (++ ��v-��PQ���� ! �h)��< ! (++ �� v��C " !! # $! )* !!! %! MU*<'5-J)(> &! U* !!! '! (>WX " 23# " ! $%&'(45/65*7 /# u#$%&'(j;M�8 - ))*-U*< ! '5J)W XV ( -(> ! �J)* " % �J6+', & -r�A $% ��6 +', & -r�A��C " !! # $# " - ! " - !! %# " ) ! " - !! &# " - ! " ) !! '# " ) ! " ) 0# V���J q¡¢�£¤-¥¦X ! �§�¨q-�G¥ ¦XV *.- © ! ª�q¡¢-U¥¦XC ""*(+ © ! «¬h) ��< ! (>-WXC " !! # $!"+ !!! %!(+ !!! &!)+ !!! '!,+ "+# V����­�v��®¯° ! ±M²­ .+ ��v<'5 )+ ³PQ���� ! T�h6��<U*7V !!!! ! ( >WXV !!!! # " 23# ! ! $%&'(89 ""# �<�´<Jµ¶8 ,++ ³ ! ´<�µ¶8 )(0 ³ ! ´<· µ¶8 (/+ ³ ! �³+'5-r�AV +!( ! {²<�'5J )WXV # -(> ! T # 0" " !! # $!(++ %!/+ &!-, '!*- " :;# " ! <=$%&'>?@ABC(89 "(#"0)- µ ! ¸¹º�- ' »�¼± ( ½¾¿ ! V�À�U�Áa ³ÂÃY4ÄÅÆ)Ç�oa ! ÈÉsÊ�Ë�-�ÌÍÎ ÏÐ�Ñ�$�-�ÌÒb "+++ ÓÔÕ ! ÖLLÕ (++ Ó Ô ! �×SØ�hCÙ8-(>WX ! ÚÛ�ÜX-³Ý $ Þ Ý !' »�¼± ( /Õßà-×Sáâ ! ãÄÅäs *.1 ! ,)1 -åæçè ! éPQÜXêë ! ìíaîïCÂÃYs -(1 ! )/1 -ðÜñòçè ! h)×Sóô�hõö>÷8 �ø-½¾¿-ùú ! 1ûü§9ýþÿ ! ���h6×S !"-ö# ! " :;# ! ! &'.>?@ABC(DE ")# ±M�$¥%vN- )+++ ©$¥<%&' "+ ©PQ�� ! &�a'®(-'(j; ! )b'(*ú+ ) * " * !" !!! #$ !!!!!!!!!!!!!!!!!!!!!!! %&'()*+ ! ,- " . # /0 !!"!! ! )*#$ ! " '( " " !"# " ! 7F&'(+, "# �,-8 *+ ./0 ! �.8 -+ )/^ ! J612.34�5 6 ! .í7k/^V "/ -ª856 *+ ³PQ/8 ! hC9u � " !! # $# ':; ! %# %&7; ! &# :�'( ! '# KL'( (# M $ );^<±'5 # )^_<( ! =tu:�'(j;' 5 ! T� ¡>?V " !! # $#$ !!! %## !!! &# $ # !!! '# $ " # # 2" )# :�'((