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ABDULAZIZ DANABOYEV

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O‘ZBEKISTON RESPUBLIKASI AXBOROT
TEXNOLOGIYALARI VA KOMMUNIKATSIYALARINI
RIVOJLANTIRISH VAZIRLIGI MUHAMMAD ALXORAZMIY NOMIDAGI TOSHKENT AXBOROT
TEXNOLOGIYALARI UNIVERSITETI
“Ehtimollar va statistika” fanidan
5-amaliy ishi
Bajardi: 810-21 guruh
Talabasi: Danaboyev A
Tekshirdi: Nosirova N
Toshkent – 2023
5-SHAXSIY TOPSHIRIQ.
ORALIQ BAHO. ISHONCHLILIK EHTIMOLI VA ISHONCHLILIK ORALIGสปI
2-variant
5.1-masala. C tanlanmaning ikkinchi X, Y, Z ustunlari boสปyicha bosh toสปplam
parametrlarining siljimagan baholari ๐‘ฅฬ… ; ๐‘† 2 ; ๐‘† topamiz.
๐‘ฅ๐‘–
6
5
10
10
13
15
6
11
10
14
8
14
6
16
8
6
8
8
7
8
10
12
ฦฉ
๐‘ฅ๐‘– − ๐‘
-2
-3
2
2
5
7
-2
3
2
6
0
6
-2
8
0
-2
0
0
-1
0
2
4
35
(๐‘ฅ๐‘– − ๐‘)2
4
9
4
4
25
49
4
9
4
36
0
36
4
64
0
4
0
0
1
0
4
16
277
๐‘ฆ๐‘–
19
18
31
31
43
49
26
42
31
45
28
49
23
57
29
23
25
32
25
29
36
39
ฦฉ
๐‘ฆ๐‘– − ๐‘
-12
-13
0
0
12
18
-5
11
0
14
-3
18
-8
26
-2
-8
-6
1
-6
-2
5
8
48
(๐‘ฆ๐‘– − ๐‘)
144
169
0
0
144
324
25
121
0
196
9
324
64
676
4
64
36
1
36
4
25
64
2457
2
๐‘ง๐‘–
28
27
56
55
74
84
31
58
54
78
47
79
35
95
39
33
41
40
39
38
59
69
ฦฉ
๐‘ง๐‘– − ๐‘
-11
-12
17
16
35
45
-8
19
15
39
8
40
-4
56
0
-6
2
1
0
-1
20
30
301
( ๐‘ง ๐‘– − ๐‘) 2
121
144
289
256
1225
2025
64
361
225
1521
64
1600
16
3136
0
36
4
1
0
1
400
900
12589
X ustun uchun hisoblashlarni amalga oshiramiz:
๐‘ฅ๐‘š๐‘–๐‘› = 5; ๐‘ฅ๐‘š๐‘Ž๐‘ฅ = 16; ๐‘ = 8; ๐‘› = 22
∑๐‘›๐‘–=1(๐‘ฅ๐‘– − ๐‘)
35
๐‘ฅฬ… =
+๐‘ =
+ 8 = 9,5909;
๐‘›
22
๐‘†๐‘‹ฬ… 2
∑๐‘›๐‘–=1(๐‘ฅ๐‘– − ๐‘)2
277
=
− (๐‘ฅฬ… − ๐‘)2 =
− (9,5909 − 8)2 = 10,06
๐‘›
22
๐‘†๐‘‹2 =
๐‘›
22
โˆ™ ๐‘†๐‘‹ฬ… 2 =
โˆ™ 10,06 = 10,539;
๐‘›−1
22 − 1
๐‘†๐‘‹ = √10,539 = 3,246
Y ustun uchun hisoblashlarni amalga oshiramiz:
๐‘ฆ๐‘š๐‘–๐‘› = 18; ๐‘ฆ๐‘š๐‘Ž๐‘ฅ = 49; ๐‘ = 31; ๐‘› = 22
∑๐‘›๐‘–=1(๐‘ฆ๐‘– − ๐‘)
48
๐‘ฆฬ… =
+๐‘ =
+ 31 = 33,18;
๐‘›
22
∑๐‘›๐‘–=1(๐‘ฆ๐‘– − ๐‘)2
2457
− (๐‘ฆฬ… − ๐‘)2 =
− (33,18 − 31)2 = 106,92
๐‘›
22
๐‘›
22
๐‘†๐‘Œ2 =
โˆ™ ๐‘†๐‘Œฬ… 2 =
โˆ™ (106,92) = 112,021;
๐‘†๐‘Œ = √112,021 = 10,583
๐‘›−1
22 − 1
๐‘†๐‘Œฬ… 2 =
Z ustun uchun hisoblashlarni amalga oshiramiz:
๐‘ง๐‘š๐‘–๐‘› = 27; ๐‘ง๐‘š๐‘Ž๐‘ฅ = 95; ๐‘ = 39; ๐‘› = 22
∑๐‘›๐‘–=1(๐‘ง๐‘– − ๐‘)
301
๐‘งฬ… =
+๐‘ =
+ 39 = 52,6818;
๐‘›
22
∑๐‘›๐‘–=1(๐‘ง๐‘– − ๐‘)2
12589
− (๐‘งฬ… − ๐‘)2 =
− (52,6818 − 39)2 = 385,035
๐‘›
22
๐‘›
22
๐‘†๐‘2 =
โˆ™ ๐‘†๐‘ฬ… 2 =
โˆ™ 385,035 = 403,37;
๐‘†๐‘ = √403,37 = 20,08
๐‘›−1
22 − 1
๐‘†๐‘ฬ… 2 =
Yuqorida keltirilgan maสผlumotlarni Excelda quyidagicha buyruqlar ketma-ketligi
orqali toppish mumkin boสปlardi:
Excel → ะ”ะฐะฝะฝั‹ะต → ะะฝะฐะปะธะท ะดะฐะฝะฝั‹ั… → ะžะฟะธัะฐั‚ะตะปัŒะฝะฐั ัั‚ะฐั‚ะธัั‚ะธะบะฐ → quyida hosil
boสปlgan oynada kerakli maสผlumotlarni kiritamiz:
5.2-masala. A va B tanlanmalar boสปyicha uchinchi va toสปrtinchi shaxsiy topshiriqlarda
olingan maสผlumotlarga asoslanib, siljimagan baholarni topamiz:
A tanlanma uchun: ๐‘ฅฬ… = 3.8023; ๐‘†ฬ… 2 = 3.8795;
kvadratik chetlanish uchun siljimagan baholar:
u holda dispersiya va oสปrtacha
86
โˆ™ 3.8795 = 3.925;
๐‘† = √3.925 = 1.981
86 − 1
B tanlanma uchun: ๐‘ฅฬ… = 132.9; ๐‘†ฬ… 2 = 48.04; u holda dispersiya va oสปrtacha
kvadratik chetlanish uchun siljimagan baholar:
๐‘†2 =
๐‘†2 =
190
โˆ™ 48.04 = 48.2941;
190 − 1
๐‘† = √48.2941 = 6.9493
5.3-masala.
0.8; ๐‘Ž๐‘”๐‘Ž๐‘Ÿ ๐‘‰ ≤ 8
๐›พ = {0.9; ๐‘Ž๐‘”๐‘Ž๐‘Ÿ 8 < ๐‘‰ ≤ 16
0.95; ๐‘Ž๐‘”๐‘Ž๐‘Ÿ ๐‘‰ > 16
2-variant uchun ishonchlilik ehtimoli ๐›พ = 0.90.9สปlganligi uchun, bosh toสปplamning
oสปrta qiymati ๐œ‡, dispersiyasi ๐œŽ 2 , standart chetlanishi ๐œŽ lar uchun ishonchlilik oraliqlari
topishda kerak boสปladigan ๐‘ก๐›พ ; ๐‘ข1 ; ๐‘ข2 koeffitsiyentlarni quyidagicha aniqlaymiz:
๐‘ก๐›พ → Excel → ๐‘“๐‘ฅ → ะกั‚ะฐั‚ะธัั‚ะธั‡ะตัะบะธะต → ะกะขะฌะฎะ”ะ•ะะข.ะžะ‘ะ .2ะฅ → “ะฒะตั€ะพัั‚ะฝะพัั‚ัŒ”
= 1-๐›พ = 1 − 0.9 = 0.11-0.9=0.1ni; “ัั‚ะตะฟะตะฝัŒ ัะฒะพะฑะพะดั‹”=n-1=22-1=21 maสผlumotlarni
kiritamiz:
Natijada ๐‘ก๐›พ = 1.72074 ekanligini aniqlaymiz.
๐‘ข1 ; ๐‘ข2 → Excel → ๐‘“๐‘ฅ → ะกั‚ะฐั‚ะธัั‚ะธั‡ะตัะบะธะต → ะฅะ˜2.ะžะ‘ะ .ะŸะฅ → ๐‘ข1 ni topish uchun
“ะ’ะตั€ะพัั‚ะฝะพัั‚ัŒ” degan joyga
1+๐›พ
2
=
1+0.9
2
= 0.95 ni kiritamiz, ๐‘ข2 ni topish uchun esa
1−๐›พ
2
=
1−0.9
2
= 0.05 ni kiritib, har ikkala holda ham “ะกั‚ะตะฟะตะฝัŒ ัะฒะพะฑะพะดั‹” – degan
qatorga k=n-1=22-1=21 tanlanma hajmidan bitta kamini kiritib topamiz:
Shunday qilib, X, Y, Z lar uchun tanlanma hajmlari bir xil boสปlgani uchun va
jadvallardan ๐‘ก๐›พ = 1.72074; ๐‘ข1 = 11.5913; ๐‘ข2 = 32.6705
X ustun uchun ishonchlilik oraliqlari quyidagicha boสปladi:
๐‘‹ฬ… −
9.5909 −
1.72074โˆ™3.246
√22
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
≤ ๐œ‡ ≤ 9.5909 +
≤ ๐œ‡ ≤ ๐‘‹ฬ… +
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
1.72074โˆ™3.246
√22
5909-
1.72074โˆ™3.246/&22≤μ≤9.5909+1.72074โˆ™3.246/&22
8.400 ≤ ๐œ‡ ≤ 10.7817400
(๐‘› − 1)๐‘† 2
(๐‘› − 1)๐‘† 2
2
≤๐œŽ ≤
๐‘ข1
๐‘ข2
(22 − 1) โˆ™ 10.539
(22 − 1) โˆ™ 10.539
≤ ๐œŽ2 ≤
11.5913
32.6705
19.0935 ≤ ๐œŽ 2 ≤ 6.77427.0935≤σ^2≤6.77427
4.369 ≤ ๐œŽ ≤ 2.602369≤σ≤2.602
ustun uchun ishonchlilik oraliqlari quyidagicha boสปladi:
๐‘Œฬ… −
33.18 −
1.72074โˆ™10.583
√22
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
≤ ๐œ‡ ≤ 33.18 +
≤ ๐œ‡ ≤ ๐‘Œฬ… +
1.72074โˆ™10.583
√22
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
.18-
1.72074โˆ™10.583/&22≤μ≤33.18+1.72074โˆ™10.583/&22
29.2974 ≤ ๐œ‡ ≤ 37.0625.2974
(๐‘› − 1)๐‘† 2
(๐‘› − 1)๐‘† 2
2
≤๐œŽ ≤
๐‘ข1
๐‘ข2
(22 − 1) โˆ™ 112.021
(22 − 1) โˆ™ 112.021
≤ ๐œŽ2 ≤
11.5913
32.6705
202.948 ≤ ๐œŽ 2 ≤ 72.0052.948≤σ^2≤72.005
14.245 ≤ ๐œŽ ≤ 8.485.245≤σ≤8.485
ustun uchun ishonchlilik oraliqlari quyidagicha boสปladi:
๐‘งฬ… −
52.6818 −
1.72074โˆ™20.08
√22
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
≤ ๐œ‡ ≤ ๐‘งฬ… +
≤ ๐œ‡ ≤ 52.6818 +
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
1.72074โˆ™20.08
√22
.6818-
1.72074โˆ™20.08/&22≤μ≤52.6818+1.72074โˆ™20.08/&22
45.315 ≤ ๐œ‡ ≤ 60.048.315
(22 − 1) โˆ™ 403.37
(22 − 1) โˆ™ 403.37
≤ ๐œŽ2 ≤
11.5913
32.6705
730.786 ≤ ๐œŽ 2 ≤ 259.2780.786≤σ^2≤259.278
27.033 ≤ ๐œŽ ≤ 16.102.033≤σ≤16.102
tanlanma uchun ishonchlilik oraliqlari quyidagicha boสปladi:
๐‘ก๐›พ = 1.6629;
๐‘ข1 = 64.7493;
๐‘ข2 = 107.521
๐‘ฅฬ… −
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
≤ ๐œ‡ ≤ ๐‘ฅฬ… +
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
3.8023 −
1.66729โˆ™1.981
√86
≤ ๐œ‡ ≤ 3.8023 +
1.66729โˆ™1.981
√86
8023-
1.66729โˆ™1.981/&86≤μ≤3.8023+1.66729โˆ™1.981/&86
3.446 ≤ ๐œ‡ ≤ 4.158446≤μ≤4.158
(86-1)โˆ™3.925/64.7493≤σ^2≤(86-1)โˆ™3.925/107.521
5.152 ≤ ๐œŽ 2 ≤ 3.102152≤σ^2≤3.102
2.269 ≤ ๐œŽ ≤ 1.761269≤σ≤1.761
tanlanma uchun ishonchlilik oraliqlari quyidagicha boสปladi:
๐‘ก๐›พ = 1.6529;
๐‘ข1 = 158.197;
๐‘ข2 = 222.075
๐‘ฅฬ… −
132.9 −
1.6529โˆ™6.9493
√190
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
≤ ๐œ‡ ≤ 132.9 +
≤ ๐œ‡ ≤ ๐‘ฅฬ… +
1.6529โˆ™6.9493
√190
๐‘ก๐›พ โˆ™ ๐‘†
√๐‘›
2.9-
1.6529โˆ™6.9493/&190≤μ≤132.9+1.6529โˆ™6.9493/&190
132.066 ≤ ๐œ‡ ≤ 133.7332.066≤μ≤133.733
(190-1)โˆ™48.2941/158.197≤σ^2≤(190-1)โˆ™48.2941/222.075
57.697 ≤ ๐œŽ 2 ≤ 41.101.697≤σ^2≤41.101
7.595 ≤ ๐œŽ ≤ 6.411595≤σ≤6.411
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