Taburan Biasa

Taburan normal adalah taburan kebarangkalian berterusan. Ia juga dipanggil pengedaran Gauss.

Fungsi ketumpatan taburan normal f (z) disebut Bell Curve kerana mempunyai bentuk yang menyerupai loceng.

Jadual taburan normal standard digunakan untuk mencari kawasan di bawah fungsi f ( z ) untuk mencari kebarangkalian julat taburan yang ditentukan.

Fungsi taburan normal

Apabila pemboleh ubah rawak X mempunyai taburan normal,

Fungsi ketumpatan kebarangkalian dan fungsi taburan kumulatif taburan normal:

 

Fungsi ketumpatan kebarangkalian (pdf)

Fungsi ketumpatan kebarangkalian diberikan oleh:

f_ {X} (x) = \ frac {1} {\ sigma \ sqrt {2 \ pi}} e ^ {- \ frac {(x- \ mu) ^ 2} {2 \ sigma ^ 2}}

X adalah pemboleh ubah rawak.

μ adalah nilai min.

σ adalah nilai sisihan piawai (std).

e = 2.7182818 ... pemalar.

π = 3.1415926 ... pemalar.

 

Fungsi pengagihan kumulatif

Fungsi pengagihan kumulatif diberikan oleh:

F_ {X} (x) = \ frac {1} {\ sigma \ sqrt {2 \ pi}} \ int _ {- \ infty} ^ {x} e ^ {- \ frac {(y- \ mu) ^ 2 } {2 \ sigma ^ 2}} dy

X adalah pemboleh ubah rawak.

μ adalah nilai min.

σ adalah nilai sisihan piawai (std).

e = 2.7182818 ... pemalar.

π = 3.1415926 ... pemalar.

Fungsi taburan normal standard

Bila

Kemudian fungsi ketumpatan kebarangkalian dan fungsi taburan kumulatif taburan normal standard:

Fungsi ketumpatan kebarangkalian

Fungsi pengagihan kumulatif

Jadual taburan normal standard

z Φ ( z ) φ ( z )
0.00 0.5000 0.3989
0.01 0.5040 0.3989
0.02 0.5080 0.3989
0.03 0.5120 0.3988
0.04 0.5160 0.3986
0.05 0.5199 0.3984
0.06 0.5239 0.3982
0.07 0.5279 0.3980
0.08 0.5319 0.3977
0.09 0.5359 0.3973
0.10 0.5398 0.3970
0.11 0.5438 0.3965
0.12 0.5478 0.3961
0.13 0.5517 0.3956
0.14 0.5557 0.3951
0.15 0.5596 0.3945
0.16 0.5636 0.3939
0.17 0.5675 0.3932
0.18 0.5714 0.3925
0.19 0.5753 0.3918
0.20 0.5793 0.3910
0.21 0.5832 0.3902
0.22 0.5871 0.3894
0.23 0.5910 0.3885
0.24 0.5948 0.3876
0.25 0.5987 0.3867
0.26 0.6026 0.3857
0.27 0.6064 0.3847
0.28 0.6103 0.3836
0.29 0.6141 0.3825
0.30 0.6179 0.3814
0.31 0.6217 0.3802
0.32 0.6255 0.3790
0.33 0.6293 0.3778
0.34 0.6331 0.3765
0.35 0.6368 0.3752
0.36 0.6406 0.3739
0.37 0.6443 0.3725
0.38 0.6480 0.3712
0.39 0.6517 0.3697
0.40 0.6554 0.3683
0.41 0.6591 0.3668
0.42 0.6628 0.3653
0.43 0.6664 0.3637
0.44 0.6700 0.3621
0.45 0.6736 0.3605
0.46 0.6772 0.3589
0.47 0.6808 0.3572
0.48 0.6844 0.3555
0.49 0.6879 0.3538
0.50 0.6915 0.3521
0.51 0.6950 0.3503
0.52 0.6985 0.3485
0.53 0.7019 0.3467
0.54 0.7054 0.3448
0.55 0.7088 0.3429
0.56 0.7123 0.3410
0.57 0.7157 0.3391
0.58 0.7190 0.3372
0.59 0.7224 0.3352
0.60 0.7257 0.3332
0.61 0.7291 0.3312
0.62 0.7324 0.3292
0.63 0.7357 0.3271
0.64 0.7389 0.3251
0.65 0.7422 0.3230
0.66 0.7454 0.3209
0.67 0.7486 0.3187
0.68 0.7517 0.3166
0.69 0.7549 0.3144
0.70 0.7580 0.3123
0.71 0.7611 0.3101
0.72 0.7642 0.3079
0.73 0.7673 0.3056
0.74 0.7704 0.3034
0.75 0.7734 0.3011
0.76 0.7764 0.2989
0.77 0.7794 0.2966
0.78 0.7823 0.2943
0.79 0.7852 0.2920
0.80 0.7881 0.2897
0.81 0.7910 0.2874
0.82 0.7939 0.2850
0.83 0.7967 0.2827
0.84 0.7995 0.2803
0.85 0.8023 0.2780
0.86 0.8051 0.2756
0.87 0.8078 0.2732
0.88 0.8106 0.2709
0.89 0.8133 0.2685
0.90 0.8159 0.2661
0.91 0.8186 0.2637
0.92 0.8212 0.2613
0.93 0.8238 0.2589
0.94 0.8264 0.2565
0.95 0.8289 0.2541
0.96 0.8315 0.2516
0.97 0.8340 0.2492
0.98 0.8365 0.2468
0.99 0.8389 0.2444
1.00 0.8413 0.2420
1.01 0.8438 0.2396
1.02 0.8461 0.2371
1.03 0.8485 0.2347
1.04 0.8508 0.2323
1.05 0.8531 0.2299
1.06 0.8554 0.2275
1.07 0.8577 0.2251
1.08 0.8599 0.2227
1.09 0.8621 0.2203
1.10 0.8643 0.2179
1.11 0.8665 0.2155
1.12 0.8686 0.2131
1.13 0.8708 0.2107
1.14 0.8729 0.2083
1.15 0.8749 0.2059
1.16 0.8770 0.2036
1.17 0.8790 0.2012
1.18 0.8810 0.1989
1.19 0.8830 0.1965
1.20 0.8849 0.1942
1.21 0.8869 0.1919
1.22 0.8888 0.1895
1.23 0.8907 0.1872
1.24 0.8925 0.1849
1.25 0.8944 0.1826
1.26 0.8962 0.1804
1.27 0.8980 0.1781
1.28 0.8997 0.1758
1.29 0.9015 0.1736
1.30 0.9032 0.1714
1.31 0.9049 0.1691
1.32 0.9066 0.1669
1.33 0.9082 0.1647
1.34 0.9099 0.1626
1.35 0.9115 0.1604
1.36 0.9131 0.1582
1.37 0.9147 0.1561
1.38 0.9162 0.1539
1.39 0.9177 0.1518
1.40 0.9192 0.1497
1.41 0.9207 0.1476
1.42 0.9222 0.1456
1.43 0.9236 0.1435
1.44 0.9251 0.1415
1.45 0.9265 0.1394
1.46 0.9279 0.1374
1.47 0.9292 0.1354
1.48 0.9306 0.1334
1.49 0.9319 0.1315
1.50 0.9332 0.1295
1.51 0.9345 0.1276
1.52 0.9357 0.1257
1.53 0.9370 0.1238
1.54 0.9382 0.1219
1.55 0.9394 0.1200
1.56 0.9406 0.1182
1.57 0.9418 0.1163
1.58 0.9429 0.1145
1.59 0.9441 0.1127
1.60 0.9452 0.1109
1.61 0.9463 0.1092
1.62 0.9474 0.1074
1.63 0.9484 0.1057
1.64 0.9495 0.1040
1.65 0.9505 0.1023
1.66 0.9515 0.1006
1.67 0.9525 0.0989
1.68 0.9535 0.0973
1.69 0.9545 0.0957
1.70 0.9554 0.0940
1.71 0.9564 0.0925
1.72 0.9573 0.0909
1.73 0.9582 0.0893
1.74 0.9591 0.0878
1.75 0.9599 0.0863
1.76 0.9608 0.0848
1.77 0.9616 0.0833
1.78 0.9625 0.0818
1.79 0.9633 0.0804
1.80 0.9641 0.0790
1.81 0.9649 0.0775
1.82 0.9656 0.0761
1.83 0.9664 0.0748
1.84 0.9671 0.0734
1.85 0.9678 0.0721
1.86 0.9686 0.0707
1.87 0.9693 0.0694
1.88 0.9699 0.0681
1.89 0.9706 0.0669
1.90 0.9713 0.0656
1.91 0.9719 0.0644
1.92 0.9726 0.0632
1.93 0.9732 0.0620
1.94 0.9738 0.0608
1.95 0.9744 0.0596
1.96 0.9750 0.0584
1.97 0.9756 0.0573
1.98 0.9761 0.0562
1.99 0.9767 0.0551
2.00 0.9772 0.0540
2.01 0.9778 0.0529
2.02 0.9783 0.0519
2.03 0.9788 0.0508
2.04 0.9793 0.0498
2.05 0.9798 0.0488
2.06 0.9803 0.0478
2.07 0.9808 0.0468
2.08 0.9812 0.0459
2.09 0.9817 0.0449
2.10 0.9821 0.0440
2.11 0.9826 0.0431
2.12 0.9830 0.0422
2.13 0.9834 0.0413
2.14 0.9838 0.0404
2.15 0.9842 0.0396
2.16 0.9846 0.0387
2.17 0.9850 0.0379
2.18 0.9854 0.0371
2.19 0.9857 0.0363
2.20 0.9861 0.0355
2.21 0.9864 0.0347
2.22 0.9868 0.0339
2.23 0.9871 0.0332
2.24 0.9875 0.0325
2.25 0.9878 0.0317
2.26 0.9881 0.0310
2.27 0.9884 0.0303
2.28 0.9887 0.0297
2.29 0.9890 0.0290
2.30 0.9893 0.0283
2.31 0.9896 0.0277
2.32 0.9898 0.0270
2.33 0.9901 0.0264
2.34 0.9904 0.0258
2.35 0.9906 0.0252
2.36 0.9909 0.0246
2.37 0.9911 0.0241
2.38 0.9913 0.0235
2.39 0.9916 0.0229
2.40 0.9918 0.0224
2.41 0.9920 0.0219
2.42 0.9922 0.0213
2.43 0.9925 0.0208
2.44 0.9927 0.0203
2.45 0.9929 0.0198
2.46 0.9931 0.0194
2.47 0.9932 0.0189
2.48 0.9934 0.0184
2.49 0.9936 0.0180
2.50 0.9938 0.0175
2.51 0.9940 0.0171
2.52 0.9941 0.0167
2.53 0.9943 0.0163
2.54 0.9945 0.0158
2.55 0.9946 0.0154
2.56 0.9948 0.0151
2.57 0.9949 0.0147
2.58 0.9951 0.0143
2.59 0.9952 0.0139
2.60 0.9953 0.0136
2.61 0.9955 0.0132
2.62 0.9956 0.0129
2.63 0.9957 0.0126
2.64 0.9959 0.0122
2.65 0.9960 0.0119
2.66 0.9961 0.0116
2.67 0.9962 0.0113
2.68 0.9963 0.0110
2.69 0.9964 0.0107
2.70 0.9965 0.0104
2.71 0.9966 0.0101
2.72 0.9967 0.0099
2.73 0.9968 0.0096
2.74 0.9969 0.0093
2.75 0.9970 0.0091
2.76 0.9971 0.0088
2.77 0.9972 0.0086
2.78 0.9973 0.0084
2.79 0.9974 0.0081
2.80 0.9974 0.0079
2.81 0.9975 0.0077
2.82 0.9976 0.0075
2.83 0.9977 0.0073
2.84 0.9977 0.0071
2.85 0.9978 0.0069
2.86 0.9979 0.0067
2.87 0.9979 0.0065
2.88 0.9980 0.0063
2.89 0.9981 0.0061
2.90 0.9981 0.0060
2.91 0.9982 0.0058
2.92 0.9982 0.0056
2.93 0.9983 0.0055
2.94 0.9984 0.0053
2.95 0.9984 0.0051
2.96 0.9985 0.0050
2.97 0.9985 0.0048
2.98 0.9986 0.0047
2.99 0.9986 0.0046
3.00 0.9987 0.0044
3.01 0.9987 0.0043
3.02 0.9987 0.0042
3.03 0.9988 0.0040
3.04 0.9988 0.0039
3.05 0.9989 0.0038
3.06 0.9989 0.0037
3.07 0.9989 0.0036
3.08 0.9990 0.0035
3.09 0.9990 0.0034
3.10 0.9990 0.0033
3.11 0.9991 0.0032
3.12 0.9991 0.0031
3.13 0.9991 0.0030
3.14 0.9992 0.0029
3.15 0.9992 0.0028
3.16 0.9992 0.0027
3.17 0.9992 0.0026
3.18 0.9993 0.0025
3.19 0.9993 0.0025
3.20 0.9993 0.0024
3.21 0.9993 0.0023
3.22 0.9994 0.0022
3.23 0.9994 0.0022
3.24 0.9994 0.0021
3.25 0.9994 0.0020
3.26 0.9994 0.0020
3.27 0.9995 0.0019
3.28 0.9995 0.0018
3.29 0.9995 0.0018
3.30 0.9995 0.0017
3.31 0.9995 0.0017
3.32 0.9995 0.0016
3.33 0.9996 0.0016
3.34 0.9996 0.0015
3.35 0.9996 0.0015
3.36 0.9996 0.0014
3.37 0.9996 0.0014
3.38 0.9996 0.0013
3.39 0.9997 0.0013
3.40 0.9997 0.0012
3.41 0.9997 0.0012
3.42 0.9997 0.0012
3.43 0.9997 0.0011
3.44 0.9997 0.0011
3.45 0.9997 0.0010
3.46 0.9997 0.0010
3.47 0.9998 0.0010
3.48 0.9998 0.0009
3.49 0.9998 0.0009
3.50 0.9998 0.0009
3.51 0.9998 0.0008
3.52 0.9998 0.0008
3.53 0.9998 0.0008
3.54 0.9998 0.0008
3.55 0.9998 0.0007
3.56 0.9998 0.0007
3.57 0.9998 0.0007
3.58 0.9998 0.0007
3.59 0.9998 0.0006
3.60 0.9998 0.0006
3.61 0.9998 0.0006
3.62 0.9999 0.0006
3.63 0.9999 0.0005
3.64 0.9999 0.0005
3.65 0.9999 0.0005
3.66 0.9999 0.0005
3.67 0.9999 0.0005
3.68 0.9999 0.0005
3.69 0.9999 0.0004
3.70 0.9999 0.0004
3.71 0.9999 0.0004
3.72 0.9999 0.0004
3.73 0.9999 0.0004
3.74 0.9999 0.0004
3.75 0.9999 0.0004
3.76 0.9999 0.0003
3.77 0.9999 0.0003
3.78 0.9999 0.0003
3.79 0.9999 0.0003
3.80 0.9999 0.0003
3.81 0.9999 0.0003
3.82 0.9999 0.0003
3.83 0.9999 0.0003
3.84 0.9999 0.0003
3.85 0.9999 0.0002
3.86 0.9999 0.0002
3.87 0.9999 0.0002
3.88 0.9999 0.0002
3.89 0.9999 0.0002
3.90 1.0000 0.0002
3.91 1.0000 0.0002
3.92 1.0000 0.0002
3.93 1.0000 0.0002
3.94 1.0000 0.0002
3.95 1.0000 0.0002
3.96 1.0000 0.0002
3.97 1.0000 0.0002
3.98 1.0000 0.0001
3.99 1.0000 0.0001

 

Graf Taburan Normal Standard (di atas sifar)

 

 

 

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