题目列表(包括答案和解析)
56.5 69.5 65 61.5 64.5 66.5 64 64.5
76 58.5 72 73.5 56 67 70 57.5 65.5
68 71 75 62 68.5 62.5 66 59.5 63.5
64.5 67.5 73 68 55 72 66.5 74 63
60 55.5 70 64.5 58 64 70.5 57 62.5
65 69 71.5 73 62 58 76 71 66 63.5
56 59.5 63.5 65 70 74.5 68.5 64 55.5
72.5 66.5 68 76 57.5 60 71.5 57 69.5
74 64.5 59 61.5 67 68 63.5 58 59
65.5 62.5 69.5 72 64.5 75.5 68.5 64
62 65.5 58.5 67.5 70.5 65 66 66.5
70 63 59.5
根据上述数据画出样本的频率分布直方图,并对相应的总体分布作出估计.
| 训练赛序号(i) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 甲校队得分(xi) | 55 | 81 | 84 | 61 | 54 | 74 | 82 | 83 | 69 | 57 |
| 乙校队得分(yi) | 58 | 84 | 86 | 71 | 57 | 73 | 83 | 85 | 68 | 63 |
. |
| x |
56.5 69.5 65 61.5 64.5 66.5 64 64.5 76 58.5 72 73.5 56 67 70 57.5 65.5 68 71 75 62 68.5 62.5 66 59.5 63.5 64.5 67.5 73 68 55 72 66.5 74 63 60 55.5 70 64.5 58 64 70.5 57 62.5 65 69 71.5 73 62 58 76 71 66 63.5 56 59.5 63.5 65 70 74.5 68.5 64 55.5 72.5 66.5 68 76 57.5 60 71.5 57 69.5 74 64.5 59 61.5 67 68 63.5 58 59 65.5 62.5 69.5 72 64.5 75.5 68.5 64 62 65.5 58.5 67.5 70.5 65 66 66.5 70 63 59.5 |
试根据上述数据,列出样本数据的频率分布表,并对相应的总体分布作估计.
某赛季,甲、乙两校篮球队进行了10场训练赛,比赛得分情况记录如下表:
| 训练赛序号(i) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 甲校队得分(xi) | 55 | 81 | 84 | 61 | 54 | 74 | 82 | 83 | 69 | 57 |
| 乙校队得分(yi) | 58 | 84 | 86 | 71 | 57 | 73 | 83 | 85 | 68 | 63 |
(1)根据得分记录表,填充以下得分茎叶图(图1),并根据茎叶图,比较甲、乙校队的得分,直接写出两个统计结论;
(2)设甲校队10场比赛得分平均值为
,将该队10场比赛得分xi依次输入程序框图(图2)进行运算,求输出S的大小,并说明S的统计意义.
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56.5 69.5 65 61.5 64.5 66.5 64 64.5 76 58.5 72 73.5 56 67 70 57.5 65.5 68 71 75 62 68.5 62.5 66 59.5 63.5 64.5 67.5 73 68 55 72 66.5 74 63 60 55.5 70 64.5 58 64 70.5 57 62.5 65 69 71.5 73 62 58 76 71 66 63.5 56 59.5 63.5 65 70 74.5 68.5 64 55.5 72.5 66.5 68 76 57.5 60 71.5 57 69.5 74 64.5 59 61.5 67 68 63.5 58 59 65.5 62.5 69.5 72 64.5 75.5 68.5 64 62 65.5 58.5 67.5 70.5 65 66 66.5 70 63 59.5 |
试根据上述数据画出样本的频率分布直方图.
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