资源描述
第1题
对某种混凝土的抗拉强度进行研究,得到它的子样的下列数据:
459
362
624
542
509
584
433
748
815
505
612
452
434
982
640
742
565
706
593
680
926
653
164
487
734
608
428
1153
593
844
527
552
513
781
474
388
824
538
862
659
775
859
755
490
697
515
628
954
771
609
402
960
885
610
292
837
473
677
358
638
699
634
555
570
840
416
606
1062
484
120
试用Minitab软件计算样本均值、样本方差、样本极差、样本离差、并用直方图反映这些数据的分布情况
。
步骤:
答案:
步骤:
答案:
第2题
试用Minitab 计算下列各式的值:
(1) 当随机变量x服从均值为2,方差为4的正态分布时,计算x=3时的累积概率密度值为多少?
(2) 当随机变量x服从标准正态分布时,计算x=3时的累积概率密度值为多少?
(3) 当随机变量x服从第一自由度为2,第二自由度为4的F分布时,求虚报概率为0.1时的F分布上侧分位数为多少?
(1) 步骤:
答案:
(2)
步骤:
答案:
(3)
答案:
第3题
从自动车床加工的一批零件中随机地抽取16件零件,测得各零件的长度如下(单位:cm):2.15,2.10,2.12,2.10,2.14,2.11,2.15,2.13,2.11,2.14,2.13,2.12,2.13,2.10,2.14,2.13。假设零件的长度服从正态分布,试求零件长度标准差的置信水平为的置信区间。
步骤:
答案:
第4题
某机床厂加工一种零件,根据经验知道,该厂加工的零件的椭圆度渐近服从正态分布,其总体均值为0.081 mm,总体标准差为0.025 mm。今另换一种新机床进行加工,取200个零件进行检验,得到椭圆度均值为0.076mm。试问新机床加工零件的椭圆度总体均值与以前有无显著差别(已检定新机床的总体标准差为0.025mm),规定显著性水平为 a=0.05 。
步骤:
答案:
第5题
两台车床生产同一种型号的滚珠,已知两车床生产的滚珠直径和分别服从,其中均未知,从甲乙两车床的产品中分别抽出25件和15件,测得样本方差,求两总体方差比的置信水平为的置信区间。
步骤:
答案:
第6题
为提高某化工厂产品的强度,选取反应温度作为试验因素,确定80℃()、100℃()、130℃()三个水平,每个水平重复试验6次,其试验数据如下表所示,试计算寻找得到最佳温度条件,并用Minitab软件进行验算计算寻找得到最佳温度条件的正确性。
表 试验数据表
水平
重复试验次数
29.6
29.8
29.5
29.0
29.3
29.1
30.5
30.0
30.6
30.3
30.4
29.8
29.3
29.0
29.4
29.2
29.2
28.6
步骤:
答案:
第7题
在某化工过程中,为了提高原材料利用率,采用重复的二因子试验设计,其试验数据如下表所示,试对这些数据进行方差分析,并找出最佳条件组合,并用Minitab软件进行验算计算寻找得到最佳温度条件的正确性。
表 试验数据表
因素
0.62
0.57
0.62
0.60
0.65
0.69
0.68
0.65
0.72
0.71
0.73
0.77
0.74
0.77
0.84
0.86
0.87
0.86
步骤:
答案:
步骤:
答案:
第8题
我国31个省市自治区的人均食品支出与人均收入数据见数据如下。试以人均食品支出为因变量、以人均收入为自变量建立回归方程并进行分析
地区
人均食出
粮食单价
人均收入
1
992
0.78
2512
2
772
0.67
2008
3
968
1.01
2139
4
1267
1.37
3329
5
874
0.72
2106
6
638
0.73
1641
7
621
0.77
1611
8
711
0.72
1684
9
654
0.7
1951
10
540
0.74
1532
11
644
0.84
1612
12
767
0.7
1727
13
723
0.63
2045
14
763
0.75
1963
15
1072
1.21
2675
17
665
0.7
1683
18
1234
0.98
2925
19
576
0.65
1691
20
733
0.84
1929
21
968
1.49
2032
22
717
0.8
1906
23
716
0.72
1705
24
627
0.61
1542
25
829
0.7
1987
26
1016
1.04
2359
26
650
0.78
1764
27
928
1.01
2087
28
650
0.83
1959
29
852
0.72
2101
30
609
0.68
1877
31
863
0.98
2006
步骤:
答案:
第9题
某矿井2006年煤质数据见数据文件如下。试以发热量为因变量、以其他有关变量为自变量建立回归方程。
日期序号
水分
灰分
硫分
发热量
1.00
17.60
5.42
0.44
5,740.00
2.00
17.30
5.58
0.48
5,760.00
3.00
16.60
5.60
0.45
5,800.00
4.00
16.40
5.39
0.43
5,850.00
5.00
16.30
5.60
0.44
5,830.00
6.00
16.40
5.47
0.43
5,850.00
7.00
16.90
5.50
0.44
5,810.00
8.00
16.60
5.10
0.42
5,890.00
9.00
16.50
5.42
0.43
5,860.00
10.00
17.30
5.39
0.45
5,810.00
11.00
17.30
5.54
0.47
5,750.00
12.00
17.60
5.71
0.45
5,740.00
13.00
17.50
5.68
0.42
5,750.00
14.00
18.00
5.74
0.45
5,690.00
15.00
18.20
5.93
0.47
5,680.00
16.00
18.30
6.28
0.54
5,620.00
17.00
16.80
5.72
0.52
5,800.00
18.00
17.30
6.01
0.50
5,730.00
19.00
17.40
5.56
0.48
5,740.00
20.00
19.50
5.67
0.50
5,580.00
21.00
18.40
6.23
0.48
5,650.00
22.00
17.10
6.36
0.50
5,730.00
23.00
16.40
6.12
0.40
5,800.00
24.00
16.20
6.32
0.50
5,810.00
25.00
16.70
6.39
0.49
5,760.00
26.00
16.50
6.26
0.49
5,770.00
27.00
16.50
6.21
0.47
5,790.00
28.00
16.60
6.34
0.53
5,760.00
29.00
16.30
6.12
0.51
5,820.00
30.00
15.80
5.88
0.49
5,850.00
31.00
16.20
6.03
0.49
5,830.00
32.00
15.90
5.68
0.52
5,850.00
33.00
16.70
5.92
0.50
5,790.00
34.00
16.20
5.56
0.50
5,830.00
35.00
16.90
5.69
0.56
5,790.00
36.00
16.40
5.55
0.47
5,860.00
37.00
16.80
5.54
0.50
5,830.00
38.00
16.50
5.44
0.47
5,860.00
39.00
16.30
5.43
0.43
5,860.00
40.00
16.30
5.54
0.46
5,860.00
41.00
16.00
5.57
0.47
5,880.00
42.00
16.60
5.61
0.47
5,810.00
43.00
16.50
5.61
0.48
5,810.00
44.00
16.30
5.21
0.44
5,870.00
45.00
16.70
5.46
0.47
5,830.00
46.00
16.90
5.59
0.45
5,790.00
47.00
17.00
5.76
0.44
5,770.00
48.00
17.50
5.37
0.45
5,780.00
49.00
19.40
5.52
0.44
5,610.00
50.00
16.70
8.53
0.54
5,590.00
51.00
19.10
12.69
0.40
5,150.00
52.00
20.00
9.37
0.39
5,320.00
53.00
17.50
6.55
0.46
5,700.00
54.00
18.30
7.01
0.45
5,600.00
55.00
18.80
8.09
0.41
5,500.00
56.00
17.90
6.65
0.49
5,670.00
57.00
16.90
5.67
0.39
5,780.00
58.00
17.30
5.61
0.41
5,770.00
59.00
17.00
6.38
0.44
5,700.00
60.00
16.10
5.63
0.42
5,840.00
61.00
16.50
5.41
0.40
5,840.00
62.00
16.40
5.62
0.40
5,800.00
63.00
16.60
5.38
0.43
5,830.00
64.00
16.90
5.64
0.43
5,770.00
65.00
16.70
5.97
0.39
5,780.00
66.00
16.50
5.65
0.37
5,830.00
67.00
16.80
5.70
0.44
5,760.00
68.00
17.10
5.89
0.44
5,740.00
69.00
17.10
6.16
0.46
5,720.00
70.00
17.60
5.78
0.41
5,680.00
71.00
16.90
5.93
0.42
5,750.00
72.00
16.80
5.65
0.39
5,780.00
73.00
17.00
5.60
0.40
5,790.00
74.00
16.80
5.65
0.38
5,810.00
75.00
16.30
5.74
0.41
5,860.00
76.00
17.30
5.70
0.43
5,760.00
77.00
17.10
5.79
0.40
5,740.00
78.00
16.90
5.39
0.40
5,810.00
79.00
17.40
5.56
0.40
5,740.00
80.00
16.70
5.80
0.38
5,810.00
81.00
17.10
5.30
0.39
5,790.00
82.00
17.00
5.77
0.43
5,760.00
83.00
16.90
5.51
0.43
5,780.00
84.00
16.90
5.02
0.40
5,830.00
85.00
16.50
5.11
0.38
5,850.00
86.00
17.10
5.32
0.42
5,800.00
87.00
16.90
5.19
0.40
5,800.00
88.00
17.30
5.36
0.41
5,770.00
89.00
17.40
5.32
0.41
5,770.00
90.00
17.00
5.94
0.49
5,720.00
91.00
16.80
5.60
0.45
5,800.00
92.00
16.70
5.24
0.40
5,810.00
93.00
17.20
5.83
0.45
5,770.00
94.00
18.20
5.05
0.40
5,740.00
95.00
17.50
5.10
0.38
5,800.00
96.00
18.20
5.18
0.34
5,710.00
97.00
17.10
5.61
0.42
5,800.00
98.00
16.50
5.82
0.47
5,820.00
99.00
17.20
5.89
0.47
5,750.00
100.00
16.90
5.58
0.46
5,800.00
101.00
17.70
5.73
0.42
5,720.00
102.00
17.20
5.54
0.38
5,790.00
103.00
17.10
5.06
0.40
5,860.00
104.00
17.40
5.27
0.40
5,800.00
105.00
17.20
4.97
0.42
5,820.00
106.00
18.00
5.31
0.54
5,730.00
107.00
17.80
5.45
0.44
5,740.00
108.00
17.70
5.39
0.42
5,760.00
109.00
17.70
5.41
0.46
5,780.00
110.00
18.10
5.65
0.46
5,690.00
111.00
17.30
5.14
0.42
5,790.00
112.00
18.00
5.27
0.41
5,710.00
113.00
17.60
4.96
0.40
5,780.00
114.00
19.20
5.04
0.32
5,650.00
115.00
18.90
5.46
0.36
5,650.00
116.00
18.40
5.36
0.41
5,700.00
117.00
18.40
5.41
0.45
5,700.00
118.00
17.40
5.74
0.50
5,750.00
119.00
18.20
5.80
0.48
5,690.00
120.00
17.60
5.52
0.43
5,760.00
121.00
16.70
5.42
0.38
5,830.00
122.00
17.20
5.48
0.48
5,760.00
123.00
16.40
5.41
0.41
5,830.00
124.00
16.80
5.33
0.44
5,830.00
125.00
16.50
5.38
0.40
5,840.00
126.00
15.70
5.35
0.41
5,880.00
127.00
17.00
5.66
0.43
5,770.00
128.00
18.00
5.72
0.46
5,700.00
129.00
17.80
6.24
0.42
5,700.00
130.00
18.10
5.69
0.41
5,660.00
131.00
16.80
5.28
0.42
5,780.00
132.00
17.60
5.78
0.46
5,730.00
133.00
18.40
5.66
0.45
5,670.00
134.00
17.20
5.73
0.45
5,790.00
135.00
17.00
5.92
0.48
5,770.00
136.00
17.10
6.07
0.50
5,740.00
137.00
16.80
5.86
0.45
5,760.00
138.00
16.80
6.33
0.45
5,730.00
139.00
16.90
6.11
0.48
5,750.00
140.00
16.80
5.62
0.41
5,740.00
141.00
15.90
5.82
0.41
5,840.00
142.00
16.90
6.15
0.42
5,750.00
143.00
17.40
6.02
0.42
5,700.00
144.00
16.90
5.51
0.40
5,760.00
145.00
17.40
5.37
0.44
5,720.00
146.00
17.60
5.97
0.42
5,690.00
147.00
16.70
8.76
0.71
5,600.00
148.00
16.60
5.71
0.43
5,770.00
149.00
16.00
6.28
0.45
5,790.00
150.00
16.20
6.71
0.41
5,780.00
151.00
16.10
7.02
0.42
5,760.00
152.00
16.10
10.32
0.50
5,510.00
153.00
16.40
10.52
0.56
5,490.00
154.00
15.00
6.37
0.49
5,890.00
155.00
16.30
10.09
0.50
5,540.00
156.00
19.40
6.01
0.46
5,600.00
157.00
16.60
6.87
0.48
5,720.00
158.00
17.40
5.90
0.43
5,740.00
159.00
17.40
5.89
0.50
5,740.00
160.00
18.10
5.45
0.53
5,670.00
161.00
16.20
6.93
0.43
5,760.00
162.00
15.80
5.94
0.41
5,900.00
163.00
16.60
5.76
0.43
5,840.00
164.00
16.00
5.72
0.51
5,820.00
165.00
17.20
6.37
0.52
5,720.00
166.00
16.00
5.87
0.53
5,830.00
167.00
16.30
5.90
0.54
5,800.00
168.00
15.90
5.71
0.56
5,810.00
169.00
15.30
5.95
0.55
5,820.00
170.00
16.80
6.68
0.50
5,730.00
171.00
16.70
6.47
0.51
5,700.00
172.00
17.00
6.43
0.52
5,750.00
173.00
16.70
6.51
0.52
5,770.00
174.00
16.60
5.80
0.46
5,830.00
175.00
15.90
6.26
0.57
5,830.00
176.00
16.00
5.73
0.52
5,890.00
177.00
16.10
6.22
0.50
5,820.00
178.00
16.20
6.13
0.44
5,790.00
179.00
16.40
6.12
0.44
5,790.00
180.00
16.70
6.46
0.42
5,740.00
181.00
16.80
6.32
0.53
5,710.00
182.00
16.40
6.29
0.42
5,760.00
183.00
16.00
6.70
0.57
5,760.00
184.00
15.60
6.46
0.49
5,840.00
185.00
15.70
7.01
0.54
5,800.00
186.00
16.10
6.60
0.47
5,810.00
187.00
16.00
6.16
0.48
5,830.00
188.00
16.30
5.93
0.52
5,830.00
189.00
16.20
6.39
0.51
5,770.00
190.00
16.00
6.55
0.48
5,780.00
191.00
16.10
6.30
0.49
5,820.00
192.00
16.20
6.07
0.42
5,780.00
193.00
16.30
6.60
0.44
5,750.00
194.00
16.50
6.80
0.51
5,750.00
195.00
16.10
6.36
0.53
5,820.00
196.00
16.80
6.18
0.47
5,760.00
197.00
16.30
6.04
0.46
5,820.00
198.00
16.00
6.10
0.55
5,840.00
199.00
16.20
6.62
0.55
5,770.00
200.00
15.90
5.73
0.47
5,890.00
201.00
15.90
5.55
0.47
5,870.00
202.00
16.70
6.63
0.59
5,760.00
203.00
16.80
6.59
0.56
5,760.00
204.00
16.40
9.16
0.55
5,610.00
205.00
16.30
10.94
0.52
5,480.00
206.00
16.60
10.61
0.51
5,480.00
207.00
16.50
9.53
0.47
5,560.00
208.00
16.70
9.79
0.53
5,490.00
209.00
16.90
10.18
0.57
5,480.00
210.00
16.80
10.58
0.61
5,460.00
211.00
17.00
9.08
0.53
5,590.00
212.00
17.30
6.42
0.61
5,740.00
213.00
17.10
6.62
0.62
5,690.00
214.00
16.90
5.67
0.58
5,780.00
215.00
16.40
6.01
0.62
5,800.00
216.00
16.30
5.54
0.57
5,830.00
217.00
16.20
5.82
0.60
5,810.00
218.00
16.20
5.85
0.59
5,800.00
219.00
16.60
6.79
0.69
5,670.00
220.00
16.80
6.38
0.56
5,760.00
221.00
16.60
6.56
0.57
5,720.00
222.00
16.90
6.32
0.54
5,760.00
223.00
16.30
6.26
0.54
5,810.00
224.00
16.30
5.90
0.56
5,820.00
225.00
16.10
5.85
0.61
5,850.00
226.00
17.00
5.96
0.56
5,800.00
227.00
16.00
5.82
0.51
5,850.00
228.00
16.00
5.75
0.53
5,840.00
229.00
16.70
5.90
0.55
5,760.00
230.00
16.10
5.75
0.62
5,870.00
231.00
17.00
5.74
0.58
5,760.00
232.00
16.70
7.16
0.59
5,680.00
233.00
16.80
6.33
0.57
5,740.00
234.00
16.50
6.30
0.53
5,780.00
235.00
16.20
6.25
0.61
5,840.00
236.00
16.70
6.22
0.58
5,780.00
237.00
16.90
6.42
0.55
5,730.00
238.00
16.70
6.22
0.61
5,780.00
239.00
16.70
7.06
0.57
5,670.00
240.00
16.50
6.08
0.51
5,750.00
241.00
17.10
5.94
0.48
5,710.00
242.00
16.60
6.35
0.49
5,720.00
243.00
16.80
6.30
0.49
5,720.00
244.00
16.80
6.16
0.56
5,770.00
245.00
16.80
6.01
0.59
5,790.00
246.00
16.50
5.75
0.57
5,830.00
247.00
16.80
6.03
0.52
5,760.00
248.00
16.80
6.44
0.56
5,730.00
249.00
16.90
5.70
0.48
5,730.00
250.00
16.90
5.92
0.48
5,790.00
251.00
16.60
6.20
0.50
5,760.00
252.00
18.30
5.93
0.46
5,630.00
253.00
18.00
6.17
0.48
5,700.00
254.00
18.10
6.16
0.55
5,670.00
255.00
17.10
5.07
0.41
5,840.00
256.00
17.70
5.99
0.44
5,700.00
257.00
16.90
5.69
0.44
5,800.00
258.00
17.70
5.50
0.47
5,730.00
259.00
16.90
6.46
0.52
5,740.00
260.00
17.40
6.89
0.53
5,630.00
261.00
16.90
6.14
0.62
5,730.00
262.00
16.80
6.83
0.53
5,680.00
263.00
17.40
6.26
0.58
5,680.00
264.00
17.20
5.91
0.48
5,710.00
265.00
18.00
5.88
0.51
5,690.00
266.00
17.60
5.86
0.50
5,710.00
267.00
17.00
6.95
0.56
5,680.00
268.00
16.20
8.46
0.53
5,640.00
269.00
18.00
5.96
0.52
5,640.00
270.00
17.10
7.14
0.54
5,650.00
271.00
18.00
7.36
0.65
5,560.00
272.00
17.00
7.06
0.52
5,640.00
273.00
17.20
7.24
0.51
5,630.00
274.00
17.30
6.69
0.51
5,640.00
275.00
17.30
6.37
0.44
5,700.00
276.00
16.80
6.32
0.49
5,710.00
277.00
16.70
5.85
0.54
5,780.00
278.00
16.60
6.07
0.42
5,760.00
279.00
16.90
5.89
0.51
5,740.00
280.00
16.90
6.69
0.51
5,700.00
281.00
17.60
6.71
0.51
5,620.00
282.00
17.00
6.68
0.54
5,710.00
283.00
17.10
6.65
0.54
5,650.00
284.00
17.20
6.35
0.50
5,710.00
285.00
16.90
6.92
0.50
5,650.00
286.00
17.10
7.23
0.46
5,650.00
287.00
16.70
6.98
0.49
5,690.00
288.00
17.00
7.57
0.51
5,650.00
289.00
16.70
6.15
0.45
5,740.00
290.00
16.60
7.63
0.47
5,650.00
291.00
16.90
7.52
0.47
5,610.00
292.00
16.50
9.76
0.52
5,520.00
293.00
16.70
8.27
0.54
5,560.00
294.00
17.30
8.79
0.51
5,510.00
295.00
17.60
7.51
0.50
5,600.00
296.00
17.60
6.84
0.51
5,660.00
297.00
17.60
6.70
0.47
5,640.00
298.00
16.90
7.17
0.50
5,690.00
299.00
17.20
7.28
0.52
5,640.00
300.00
17.40
6.20
0.49
5,700.00
301.00
17.30
6.51
0.49
5,690.00
302.00
16.00
4.46
0.53
5,770.00
303.00
17.80
6.46
0.48
5,640.00
304.00
16.80
6.22
0.52
5,720.00
305.00
18.20
7.51
0.46
5,600.00
306.00
17.70
7.58
0.45
5,590.00
307.00
15.90
5.77
0.40
5,820.00
308.00
16.60
5.92
0.45
5,750.00
309.00
17.10
6.26
0.53
5,710.00
310.00
17.30
6.37
0.45
5,680.00
311.00
17.20
6.30
0.48
5,710.00
312.00
17.20
6.36
0.50
5,700.00
313.00
18.20
6.56
0.54
5,650.00
314.00
18.00
6.76
0.50
5,660.00
315.00
18.20
6.58
0.54
5,620.00
316.00
16.30
8.16
0.96
5,650.00
317.00
17.40
7.24
0.52
5,630.00
318.00
18.40
6.98
0.46
5,590.00
319.00
17.10
6.55
0.51
5,710.00
320.00
17.10
7.02
0.48
5,670.00
321.00
17.60
6.79
0.49
5,650.00
322.00
18.00
6.47
0.48
5,680.00
323.00
18.90
6.95
0.47
5,530.00
324.00
18.50
6.46
0.45
5,620.00
325.00
15.40
6.22
0.49
5,860.00
326.00
18.00
6.74
0.46
5,630.00
327.00
17.10
6.36
0.47
5,720.00
328.00
17.30
6.34
0.48
5,690.00
329.00
17.20
6.56
0.48
5,690.00
330.00
18.60
6.18
0.45
5,590.00
331.00
17.40
6.54
0.45
5,680.00
332.00
18.00
6.66
0.47
5,640.00
333.00
17.40
6.80
0.49
5,670.00
334.00
17.50
6.55
0.46
5,680.00
335.00
17.70
6.81
0.46
5,690.00
336.00
17.30
6.90
0.46
5,680.00
337.00
17.90
8.22
0.50
5,570.00
338.00
17.80
8.56
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