toán xac suat thong ke pot

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


Cơ sở lý thuyết:
 !"
#$%&'(%)*+,- !."
/0P-giá trị
Ước lượng kỳ vọng toán của ĐLNN.
"&123456 !"378''9!:+;!<*<*%=>523734?8<*@+!A;!;*
BC<*6@0D!%<*'%-*E
?!DF69G*!6

%H/IC6J24@6JDK
'!DLMNO=
P56
Q$)RS+'O%TU656#5V6
%'.RS+65V6!A'W(6D!
?!+B%&*U !P@@B%,'X%!'
6
?;' 65@D!%DO
6@'.RS+
6@)RS+<*%= !6
Q$)RS+)%265I76#56MY'&%;(O%%&* !64
?!MYO= 65
%'.RS+65V!!A'W(*Z*
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D!
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45]656
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245]656
%'.RS+65]6)RS+)% !6@24
Q$)RS+;%265676#5IMY'&%;(O%'! !64
?!MYO= 65
%'.RS+65V!!A'W(*Z*
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D!
2PHV*
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45]656
?!+@B%&*U !P@B%&'X%!'
245]656
%'.RS+65]6)RS+)% !6@24
$%&'(%)*+,- !."
$%^%=U*.M:*%_*3&%_;=.''9
$`%_*1234567!;234567;'6!B%,
?8.0Da@'b%!A'656I7%b-'%-*@+%U`c!6;!^%&'(%)*+,
656
?8''9!:+<*>523734@d''e;<*
"3;=''9!B%,G*+*SW9%TD*:fH/IC6J6
3W+MgR=**Z%&'( P5
$%',*%)*+,'hCPJ2I74
%H/I!&:+6JDK
!%-*!;*BC !iD%%="?j
%k5lmn


Bo#IIp7qB !%_$???%_!7%-*!;*BC !i
D%%="?j!0B!+9r
Đề bài:
Kết quả điều tra chiều cao sinh viên nữ
trường đại học Thương Mại của nhóm 6.
Kết quả điều tra chiều cao sinh viên nữ
trường đại học Thương Mại của nhóm 6.
Chiềucao (cm) Trung tâm lớp
(x
i
)
n
i
n
i
x
i
n
i
x
i

2
147 – 149
150 – 152
153 – 155
156 – 158
159 – 161
162 – 164

165 – 167
168 – 170
148
151
154
157
160
163
166
169
1
10
22
22
21
16
7
1
148
1510
3388
3454
3360
2608
1162
169
21904
228010
521752
542278

537600
425104
192892
28561

s5II s5mll s5#pltI
%3@%-*! !iD%%='u%?0ju%
X@%-*!;*BC !iD%%=;b'u%0u%;=<*v
w@%-*!;*BC !iD%%=;b'u%?0ju%;=''9
C5IIH/I=XWO%T:TE*Z
X2wx4
'P52Ix4
?!A'W(*ZD!
2\45][5k
?!+B%&*U !P@9U;=@B%,'X%0'07!
2\45][5k
2Vy\\Qy45][5k%z5

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K
5p7m/
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I7I#m
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z5T7l|I7ttp
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!+2m7Im/xmt7tp4
$,*S%'.RS+lmn!&%;}%-*!;*BC !iD%%=;b'u%?0
ju%};)

2m7Im/xmt7tp4
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3?~$"P5
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,*'hCP 2Ix4%U`c![5I7Im;!C'W(*ZD!2≃ *H
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