(两样本均数比较的假设检验)作业
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正态分布评估
To do one sample t test manually using data on page 124.
One-Sample Statistics
N
Mean
Std. Deviation
Std. Error Mean
实验组
7
.275257
.0476637
.0180152
对照组
7
.319343
.0570867
Sig.
Pair 1
疗程初血压&疗程末血压
20
.510
.022
Paired Samples Test
Paired Differences
t
df
Sig. (2-tailed)
Mean
Std. Deviation
Std. Error Mean
95% Confidence Interval of the Difference
One-Sample Kolmogorov-Smirnov Test
饮料的销售量
N
50
Normal Parametersa
Mean
75.96
Std. Deviation
11.604
Most Extreme Differences
Absolute
.076
Positive
.074
Negative
-.076
76.19
Median
77.50
Variance
134.651
Std. Deviation
11.604
Minimum
46
Maximum
99
Range
53
InterquartileRange
18
Skewness
-.242
.337
Kurtosis
-.330
.662
2.Build up your own database (or use data from text book). Requirements: 3 database, one sample, two samples, paired-design sample.
50
62.5%
30
37.5%
80
100.0%
Descriptives
Statistic
Std. Error
饮料的销售量
Mean
75.96
1.641
95% Confidence Interval for Mean
Lower Bound
72.66
Upper Bound
79.26
5% Trimmed Mean
饮料的销售量*销售网点编号
50
62.5%
30
37.5%
80
100.0%
均值
Report
饮料的销售量
销售网点编号
Mean
N
Std. Deviation
1
46.00
1
.
2
57.00
1
.
3
62.00
1
.
4
63.00
1
.
5
64.00
1
.
6
66.00
1
.
7
67.00
1
.
8
69.00
1
.
9
72.00
1
.
10
73.00
1
.
28
85.00
1
.
29
86.00
1
.
30
87.00
1
.
31
88.00
1
.
32
88.00
1
.
33
89.00
1
.
34
89.00
1
.
35
90.00
1
.
36
92.00
1
.
37
94.00
1
.
38
96.00
1
.
39
99.00
1
.
40
53.00
1
.
41
62.00
1
.
42
63.00
1
.
43
64.00
1
.
44
66.00
Kolmogorov-Smirnov Z
.536
Asymp. Sig. (2-tailed)
.936
a. Test distribution isNormal.
Case Processing Summary
Cases
Included
Excluded
Total
N
Percent
N
Percent
N
Percent
Paired Samples Statistics
Mean
N
Std. Deviation
Std. Error Mean
Pair 1
疗程初血压
153.10
20
41.167
9.205
疗程末血压
140.25
20
43.060
9.629
Paired Samples Correlations
N
Correlation
1
.
45
66.00
1
.
46
67.00
1
.
47
68.00
1
.
48
68.00
1
.
49
71.00
1
.
50
72.00
1
.
Total
75.96
50
11.604
置信区间
Case Processing Summary
Cases
Valid
Missing
Total
N
Percent
N
Percent
N
Percent
饮料的销售量
单样本t分布检验
One-Sample Statistics
N
Mean
Std. Deviation
Std. Error Mean
饮料的销售量
20
70.60
8.917
1.994
One-Sample Test
Test Value = 70
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Levene's Test for Equality of Variances
t-test for Equality of Means
F
Sig.
t
df
Sig. (2-tailed)
Mean Difference
Std. Error Difference
95% Confidence Interval of the Difference
1
.
11
73.00
1
.
12
74.00
1
.
13
76.00
1
.
14
77.00
1
.
15
78.00
1
.
16
78.00
1
.
17
78.00
1
.
18
79.00
1
.
19
79.00
1
.
20
81.00
1
.
21
81.00
1
.
22
82.00
1
.
23
83.00
1
.
24
84.00
1
.
25
84.00
1
.
26
84.00
1
.
27
85.00
Notes: define variable, data type, sample size 20.
单样本t分布检验
独立t分布检验
配对t分布检验
3.To do one sample t test, two independent samples t test, paired-design t test. Write out the whole steps of hypothesis testing.
Lower
Upper
Pair 1
疗程初血压-疗程末血压
12.850
41.738
9.333
-6.684
32.384
1.377
19
.185
4.To do one sample t test, two independent samples t test, paired-design t test. Write out the whole steps of hypothesis testing.
Lower
Upper
数学
Equal variances assumed
4.441