在职研究生医学统计学作业一峰王Word文档下载推荐.docx
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Mean
45.45
76.51
19.02
117.65
76.20
36.563
59.79
164.71
27.43
16.86
11.6939
Median
47.00
78.00
19.00
120.00
76.00
36.500
60.00
165.00
14.00
15.00
11.0000
Std.Deviation
12.075
8.778
1.601
8.059
8.818
.2138
9.858
6.252
47.185
5.408
5.60953
Percentiles
25
36.00
70.50
18.00
110.00
70.00
36.400
52.50
160.00
7.00
12.00
8.0000
50
75
54.00
80.00
20.00
36.800
65.50
169.00
24.00
20.50
16.0000
B
46.48
72.86
19.24
116.10
75.00
36.532
58.06
162.52
26.30
18.50
13.1600
45.50
73.50
59.00
161.50
13.00
13.0000
12.430
7.217
1.393
9.552
6.350
.1834
8.082
6.377
38.733
6.329
5.65093
69.50
50.00
158.00
8.50
12.75
8.7500
57.25
79.00
36.700
62.25
168.00
24.25
17.2500
标准差描述,不符合近似正态分布指标用中位数及四分位数间距描述;
A均数
B均数
A标准差
B标准差
A组中位数
B组中位数
A组四分位数间距
B四分位数间距
Sp
120-110=10
24.00-8.25=15.75
24.00-9.00=15.00
分类变量指标的描述:
CaseProcessingSummary
Cases
Total
Percent
group_1*gender
99
100.0%
.0%
group_1*gms
group_1*zls
group_1*zylx
group_1*genderCrosstabulation
gender
1
2
group_1
1.00
Count
22
27
%withingroup_1
44.9%
55.1%
2.00
16
34
32.0%
68.0%
38
61
38.4%
61.6%
group_1*gmsCrosstabulation
gms
44
6
88.0%
12.0%
93
93.9%
6.1%
group_1*zlsCrosstabulation
zls
40
9
81.6%
18.4%
10
80.0%
20.0%
80
19
80.8%
19.2%
group_1*zylxCrosstabulation
zylx
3
4
23
21
4.1%
46.9%
42.9%
5
10.0%
42.0%
46.0%
2.0%
7
7.1%
44.4%
4.0%
(二)、实验统计的推断分析:
1、利用t检验或单因素方差齐性检验分析各计数指标是否方差齐;
SPSS统计软件对计数指标进行t检验可得下表:
Levene'
sTestforEqualityofVariances
t-testforEqualityofMeans
F
Sig.
t
df
Sig.(2-tailed)
MeanDifference
Std.ErrorDifference
95%ConfidenceIntervaloftheDifference
Lower
Upper
Equalvariancesassumed
.268
.606
-.419
97
.676
-1.031
2.464
-5.920
3.858
Equalvariancesnotassumed
96.993
2.463
-5.919
3.857
5.549
.021
-1.318
.191
-.129
.098
-.323
.065
-1.317
96.310
.384
.537
2.262
.026
3.650
1.614
.448
6.853
2.258
92.777
1.617
.439
6.861
.005
.946
-.729
.468
-.220
.301
-.818
.379
-.727
94.635
.469
.302
-.819
.380
.102
.750
.781
.437
1.204
1.542
-1.856
4.265
.778
87.143
.438
1.547
-1.871
4.279
3.095
.082
.436
.0313
.0400
-.0481
.1107
.780
94.209
.0401
-.0483
.1108
2.341
.129
.956
.342
1.730
1.810
-1.863
5.322
.954
92.672
.343
1.814
-1.872
5.332
.215
.644
1.729
.087
2.194
1.269
-.325
4.714
97.000
4.713
2.804
.097
-1.387
.169
-1.643
1.184
-3.993
.708
-1.389
95.247
.168
1.182
-3.990
.704
.031
.860
-1.295
.198
-1.46612
1.13183
-3.71249
.78024
96.983
1.13174
-3.71232
.78008
上表可知heart指数的P值为0.025<α=0.05,故选用协方差对其进行校正分析。
heart指数协方差如下:
TestsofBetween-SubjectsEffects
DependentVariable:
d
Source
TypeIIISumofSquares
MeanSquare
CorrectedModel
98.274(a)
49.137
1.541
.219
Intercept
49.031
1.538
.218
37.525
1.177
.281
group1
81.496
80.496
2.528
.115
Error
3060.474
96
31.880
18615.000
CorrectedTotal
3158.747
98
aRSquared=.031(AdjustedRSquared=.011)
从上表可知:
经协方差校正后heart指数的F值为1.541,P值为0.219>α=0.05。
综上所述经t检验后可知:
age、heart、breathe、dp、temp、weight、height、tt_1、d的P值均>α=0.05,按α=0.05水准,可认为A、B两组资料方差齐;
A、B两组药物治疗前后胃部疼痛评分差值d无统计学差别。
2、无序分类变量需选用卡方检验分析:
利用SPSS统计软件对无序分类变量gender、gms、zls进行卡方检验得下表有:
Crosstab
ExpectedCount
18.8
30.2
49.0
19.2
30.8
50.0
38.0
61.0
99.0
Chi-SquareTests
Value
Asymp.Sig.(2-sided)
ExactSig.(2-sided)
ExactSig.(1-sided)
PointProbability
PearsonChi-Square
1.741(b)
.187
.133
ContinuityCorrection(a)
1.238
.266
LikelihoodRatio
1.746
.186
Fisher'
sExactTest
Linear-by-LinearAssociation
1.723(c)
.189
.070
NofValidCases
aComputedonlyfora2x2table
b0cells(.0%)haveexpectedcountlessthan5.Theminimumexpectedcountis18.81.
cThestandardizedstatisticis1.313.
46.0
3.0
47.0
93.0
6.0
6.259(b)
.012
.027
.014
4.329
.037
8.577
.003
6.196(c)
.013
b2cells(50.0%)haveexpectedcountlessthan5.Theminimumexpectedcountis2.97.
cThestandardizedstatisticis2.489.
group_1*zlsCrosstab
39.6
9.4
40.4
9.6
80.0
19.0
.043(b)
.837
1.000
.520
.000
.043
.042(c)
.197
b0cells(.0%)haveexpectedcountlessthan5.Theminimumexpectedcountis9.40.
cThe