ap stats formula sheet
TRANSCRIPT
I. Descriptive Statistics
= - Z*on
U=
bt=
sr=
sp= (q - l) + (nz -L)
b0 + brr
\{q-E)(u.i-il)l@5-D2
bs=!-bfi
,=#>("#)(T)
b, = rfu-'S,
sbl = trc;a
f1\rn--r)z
(nt - 1)s!+ (n2 -lsl
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II. Probability
P(AU B) -- P(A) + P(B) - P@n B)
P@lD=W
E(X) = tL, =\rnpu
var(X) = o2, = \t"n - lt")z pt
If X has a binomial distribution with parameters n and p, then:
P(x =n=(T)nr\-d"-k
IIa = 1W
o, = J71p(1fi
ITh=P
n^=.M--p I n
If r is the mean of a random sample of size n from an infinite population with mean pand standard deviation o, then:
Fz=V
6=_+* Jn
III. Inferential Statistics
Standardized test statistic: , :tutit:it , l*t."t:t, , ,,snnoaro oevlauon or stansuc
Confidence intervat statistic t (critical value) . (standard deviation of statistic)
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Single-Sample
Two-Sample
Difference of
sample means
Special case when61=62
Difference of
sample proportions
Special case whenPr=Pz
,[N:6r+
m$- il + p20- p2)
chi-square test statistic - 5' (observ-e-L:-e-:Pected)2
H expecrco
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Table entry
for a is the
probability
lying below a.
Table A
-3.4
-3.3_.L
'-3.1
-3.0
.0003
.0005
.0007
.0009
.0013
.0003
.0005
.0006
.0009
.0013
.0080 .0078
.0104 .0102
.0136 .0t32
.0774 .0170
.0222 .02t7
.0281 .0274
.0003 .0003 .0003
.0004 .0004 .0004
.0006 .0006 .0006
.0009 .0008 .0008
.0012 .00t2 .0011
.0075 .0073
.0099 .0096
.0129 .0125
.0166 .0162
.02t2 .0207
.0268 .0262
.0003
.0004
.0006
.0008
.0011
.0071 .0069
.0094 .0091
.0L22 .0119
.0158 .0154
.0202 .0197
.0256 .0250
.0003
.0004
.0005
.0007
.0010
.0002
.0003
.0005
.0007
.0010
.0838 .0823
.1003 .0985
.1190 .tr70
.1401 .1379
.1635 .1611
Standard normal probabilities
2 .00 .01 .02 .03 .04 .05
Probability
I
z
.06 .07 ,08 .09
.0003
.0005
.0007
.0010
.0013
.0082
.0003
.0004
.000s
.0008
.0011
-2.4qt
-2.1
-2.0
-1.9
-1.3
-L.2
-1.1
-1.0
-0.9
.0107
.0139
.0179
.0228
.0287
.0068 .0066 .0064
.0089 .0087 .0084
.0116 .0113 .0110
.0150 .0146 .0143
.0t92 .0188 .0183
.0244 .0239 .0233
_0968 .0951
.1151 .1131
.1357 .1335
.1587 .1562
.1841 .1814
.0901 .0885
.1075 .1056
.L27r .L25t
.t492 .1469
.1736 .L7LL
.0869 .0853
.1038 .L020
.1230 .L210
.t446 .1423
.1685 .1660
.0934
.ttt2
.1314
.1539
.1788
.0ei8
.1093
.1292
.1515
.1762
-0.3
-0.2
-0.1
-0.0
.382r .3783 .3745
.4207 .4168 .4129
.4602 .4562 .4522
.s000 .4960 .4920
.3707 .3669 .3632 .3594
.4090 .4052 .4013 .3974
.4483 .4443 .4404 .4364
.4880 .4840 .4801 .476r
.3557 .3520 .3483
.3936 .3897 .3859
.4325 .4286 .4247
.472t .4681 .4641
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Thble entryfor a is theprobabilitylying below e.
Table A (Conti,nued,)
z
Probabilitv
I
z
Standard normal probabilities
.02 .03 .04 .05 .08 .09.07.06
0.0
0.1
0.2
0.3
0.4
1.0
1.1
t.2
1.3
1.4
1.5
1.6
,,2.3
2.4OE
2.6
.5000 .5040
.5398 .5438
.5793 .5832
.6t79 .6217
.6554 .6591
.5160
.5557
.5948
.6331
.6700
.5199
.5596
.5987
.6368
.6736
.8508 .8531
.8729 .8749
.8925 .8944
.9099 .9115
.925I .9265
.9382 .9394
.9495 .9505
.5239 .5279
.5636 .5675
.6026 .6064
.6406 .6443
.6772 .6808
.8554 .8577
.8770 .8790
.8962 .8980
,9131 .9147
.9279 .9292
.9406 .9418
.9515 .9525
.5080
.5478
.5871
.6255
.6628
.5120
.5517
.5910
.6293
.6664
.5319
.57t4
.6103
.6480
.6844
.5359
.5753
.6141
.6517
.6879
.8413 .8438
.8643 .8665
.8849 .8869
.9032 .9049
.9t92 .9207
.9332 .9345
.9452 .9463
.8461 .8485
.8686 .8708
.8888 .8907
.9066 .9082
.9222 .9236
.9357 .9370
.9474 .9484
.8599 .862t
.8810 .8830
.8997 .9015
.9162 .9177
.9306 .9319
.9429 .9441
.9535 .9545
a,
3.4
.9861 .9864
.9893 .9896
.9918 .9920
.9938 .9940
.9953 .9955
.9868 .9871
.9898 .9901
.9922 .9925
.9941 .9943
.9956 .9957
.9875 .9878
.9904 .9906
.9927 .9929
.9945 .9946
.99s9 .9960
.9881 .9884
.9909 _9911
.9931 .9932
.9948 .9949
.9961 .9962
.9887 .9890
.9913 .9916
.9934 .9936
.9951 .9952
.9963 .9964
.9995 .9995 .9995
.9996 .9996 .9997
.9997 .9997 .9998
.9993 .9993 .9994
.9995 .9995 .9995
.9997 .9997 .9997
.9994 .9994 .9994 .9994
.9996 .9996 .9996 .9996
.9997 .9997 .9997 .9997
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Table entry forpand C is the pointt* with probabilityp lying above itand probability Clying between
-t* and t*.
Table B
?.€i-:$
2l22
23
24
25
40
50
60
80
100
1000
Probabilityp
I
t*t distribution critical values
Tail
df .25 .20 .15 .10 .05 .025
It3
4
5
.002s .001 .0005
1.000 1.376 1.963 3.078 6.314 t2.7t 15.89 31.82 63.66
.816 1.061 1.386 1.886 2.920 4.303 4.849 6.965 9.925 14.09 22.33 31.60
.765 .978 Lzffi 1.638 2.353 3.182 3.482 4.54t 5.841 7.453 10.21 L2.92
.74t .941 1.190 1.533 2.132 2.776 2.999 3.747 4.604 5.598 7.173 8.610
.727 .920 1.156 L.476 2.015 2.571 2.757 3.365 4.032 4.773 5.893 6.869
.876 1.088 1.363 1.796 2.201 2.328 2.718 3.106 3.497 4.025 4.437
.873 r.083 1.356 1.782 2.179 2.303 2.681 3.0s5 3.428 3.930 4.318
.870 1.079 1.350 1.771 2.160 2.282 2.650 3.012 3.372 3.852 4.221
.868 1.076 1.345 1.761 2.145 2.264 2.624 2.977 3.326 3.787 4.140
.866 1.074 1.341 1.753 2.131 2.249 2.602 2.947 3.286 3.733 4.M3
1.063 1.323 1.72t 2.080 2.189 2.518 2.831 3.135 3.527 3.819
1.061 1.321 1.717 2.074 2.183 2.508 2.819 3.119 3.505 3.792
1.060 1.319 1.714 2.069 2.177 2.500 2.807 3.104 3.485 3.768
1.059 1.318 1.711 2.064 2.172 2.492 2.797 3.091 3.467 3.745
1.058 1.316 1.708 2.060 2.167 2.485 2.787 3.078 3.450 3.725
1.050 1.303 1.684 2.021 2.123 2.423 2.704 2.971 3.307 3.551
t.047 1.299 t.676 2.009 2.109 2.403 2.678 2.937 3.261 3.496
1.045 1.296 t.67t 2.000 2.099 2.390 2.660 2.915 3.232 3.460
1.043 1.292 1.664 1.990 2.088 2.374 2.639 2.887 3.195 3.416
1.042 1.290 1.660 1.984 2.081 2.364 2.626 2.871 3.t74 3.390
1.037 1.282 1.646 1.962 2.056 2.330 2.581 2.813 3.098 3.300
1.036 1.282 1.645 1.960 2.054 2.326 2.576 2.807 3.091 3.291
70% 95% 96% 98% 99% 99.5% 99.8% 99.9%
Confidence level C
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.697
.695
.694
.692
.691
.859
.858
.858
.857
.856
.686
.686
.685
.685
.684
.851
.849
.848
.846
.845
.842
.841
60%
.681
.679
.679
.678
.677
.675
.674
50%
18
Thble entryforp is thepoint (22) withprobabilityplying above it.
Table C
1
t
J
4
5
1.32
2.77
4.11
5.39
6.63
11
12
13
14
l5
.25 .20 .15dT
Probabilityp
I
(x2)
,fzcritical values
Tail probabilityp
.10 .05 .02s
l.6t3.22
4.U
5.99
7.29
24.93 26.17
26.04 27.30
27.14 28.43
28.24 29.55
n.u 30.68
45.62 47.27
56.33 58.16
66.98 68.97
88.13 90.41
109.1 111.7
3.84 5.02
5.99 7.38
7.81 9.35
9.49 11.14
11.07 12.83
6.63 7.88
9.2r 10.60
11.34 12.84
13.28 14.86
15.09 16.75
9.14 10.83
11.98 13.82
14.32 16.27
t6.42 18.47
18.39 20.51
2.07
319
5.32
6.74
8.r2
2.71
4.61
6.25
7.78
9.24
5.41
7.82
9.84
11.67
13.39
13.70 14.63 t5.77
14.85 15.81 16.99
15.98 16.98 18.20
17.12 18.15 19.41
18.25 19.31 20.60
17.28 19.68
18.55 21.03
19.81 22.36
21.06 23.68
22.31 25.00
29.62
30.81
32.01
33.20
34.38
32.67
33.92
35.17
36.42
37.65
2r.92 22.62
23.34 24.05
24.74 25.47
26.12 26.87
27.49 28.26
26.76 28.n T.26
28.30 30.32 32.91
29.82 31.88 34.53
31.32 33.43 36.12
32.80 34.95 37.70
41.40 43.78 46.80
42.80 45.20 48.27
44.18 46.62 49:73
45.56 48.03 51.18
46.93 49.44 52.62
24.72
26.22
27.69
29.14
30.58
21
,t
23
24
25
27.66
28.82
29.98
31.13
32.28
35.48
36.78
38.08
39.36
40.65
36.34 38.93
37.66 40.29
38.97 At.M
40.27 42.98
4t.57 44.31
40
50
60
80
100
49.24
60.35
71.U
93.11
114.7
51.81 55.76
63.17 67.50
74.40 79.08
96.58 101.9
118.5 124.3
59.34 60.44
71.42 72.61
83.30 84.58
106.6 108.1
t29.6 131.1
63.69 66.77
76.15 79.49
88.38 91.95
112.3 116.3
135.8 140.2
69.70 73.40
82.66 86.66
95.34 99.61
120.1 124.8
144.3 149.4
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