统计学原理第五版第三章计算题答案Word文档格式.docx
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播种面积
（亩）
（亩）
山地
100
25,000
250
150
1,250
1,875,000
丘陵地
150,000
1,000
200
500
100,000
平原地
400
500,000
450
750
337,500
合计
270
675,000
2,500
250
625,000
在相同的耕地自然条件下，乙村的单产均高于甲村，故乙村的生产经营管理工作做得好。
但由于甲村的平原地所占比重大，山地所占比重小，乙村则相反，由于权数的作用，使得甲村的总平均单产高于乙村。
9．
按产值计划完成程度分组（%）
组中值
各组企业占总数的比重（系数）
95-100
97.5
0.12
11.7
100-105
102.5
0.56
57.4
105-110
107.5
0.24
25.8
110-115
112.5
0.08
9.0
-
1.00
103.9
10．见教材P433
11．
或参照课本P99
12．
13．
水稻收获量（千克/亩）
耕地面积（亩）f
组中值x
xf
以下累计次数
150-175
18
162.5
2925.0
-115.5
2079
175-200
32
187.5
6000.0
50
-90.5
2896
200-225
53
212.5
11262.5
103
-65.5
3471.5
225-250
69
237.5
16387.5
172
-40.5
2794.5
250-275
84
262.5
22050.0
256
-15.5
1302
275-300
133
287.5
38237.5
389
9.5
1263.5
300-325
119
312.5
37187.5
508
34.5
4105.5
325-350
56
337.5
18900.0
564
59.5
3332
350-375
22
362.5
7975.0
586
84.5
1859.8
375-425
10
4000.0
596
122
1220.4
425-500
4
462.5
1850.0
600
184.5
738.16
166775
25067.8
（1）
（2）
R=500-150=350（千克/亩）
（3）
“
（4）根据以上计算，294.5千克/亩>
283.3千克/亩>
277.96千克/亩，即M0>
Me>
，故资料分布为左偏（即下偏）。
14．
日产量
甲单位工人人数（人）
1
120
-0.5
30
2
60
0.5
15
3
20
1.5
45
合计
300
-
90
乙单位总产量（付）
30
-0.8
19.2
0.2
2.4
10
1.2
14.4
180
36.0
15．见教材P435
（英文版）
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