![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
旅游类别 | 城市展馆科技游 | 乡村特色游 | 红色景点游 | 登山套票 | 游园套票 | 观海套票 |
套票价格 | 39 | 49 | 58 | 67 | 77 | 86 |
购买数量 | 16.7 | 18.7 | 20.6 | 22.5 | 24.1 | 25.6 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c65248515ab28f4b29b3d150732d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b725f9c7e74c28bce2ea59c3fe14495c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146b4c8e73cce5260765a4d2255362cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
附:①可能用到的数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d109b45e11b8bea36a8663ed838ef215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b4919e04562fcd67170a9c935b27cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65e2b369064bb1063ef37085d2d192f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebaca237780296f6ae6c6d26b819629c.png)
②对于一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7b9cd3c6dcb94dc19589c190272885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0703c0cc229051c64f2fc409242a2e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4543fa084611216c0aab75fc73d973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db810ed17100b829bce0ec9ad2fbc14c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33438e51be1bc18463d68fd2461cad58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749bca5c0357ef3068bd5300392f092b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d9824e0c876f4122f0c5952de29e5a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1816cdb5d470435b5832070a27dc79f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f7c4a8558eff6427d22b6c0c855721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d9824e0c876f4122f0c5952de29e5a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1816cdb5d470435b5832070a27dc79f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5912f7cc3a289870c54fc410477a7925.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/11/2658d584-5003-4826-ba21-3fe8d8b93ed8.png?resizew=372)
(1)根据散点图分析
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)根据散点图相应数据计算得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150dcb9a2eb62230a991926ca9cb5e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d332a1006a2038600db9830d7e2bf15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2c4d12b3a705daab723ab243b6cc88.png)
附:回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183200de4ff08be4eb636e8169c099a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685e49f53c29df9064600b6e4d7957bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
1 | 2 | 3 | 4 | 5 | |
45 | 56 | 64 | 68 | 72 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)该公司为了了解社会人员对人工智能教育的满意程度,调研了200名参加过人工智能教育的人员,得到数据如表:
满意 | 不满意 | 总计 | |
男 | 90 | 110 | |
女 | 30 | ||
总计 | 150 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6531338b32072c1dc000e683bdee60eb.png)
附1:线性回归方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503e6d331925962ba8af0f994b62814f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
附2:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.15 | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 | |
2.072 | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
37 | 38 | 39 | 40 | |
1 | 2 | 4 | 5 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
35及以下 | 36 | 37 | 38 | 39 | 40 | 41 | |
频数 | 4 | 6 | 5 | 4 | 6 | 4 | 2 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)该冷饮批发店每天的平均收入与日最高温度的相关关系如下俵:
35及以下 | 36 | 37 | 38 | 39 | 40 | 41 | |
日均收入(千元) | 0 | 0.5 | 1 | 2 | 3 | 4 |
附参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9874c5d906442bd944d2ed717dba77f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f4d3ab5f8ec8405fe32fd181ce32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
3 | 4 | 5 | 6 | 7 | |
5.2 | 5.9 | 6.8 | 7.1 | 8 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100f7d3187d6d3b2cf2437d88833532e.png)
月份 | 1 | 2 | 3 | 4 | 5 |
“金牌销售”员工数 | 120 | 105 | 100 | 95 | 80 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
(2)为了进一步了解员工们的销售情况,选取了员工们在3月份的销售数据进行分析,统计结果如下:
金牌销售 | 普通销售 | 合计 | |
女员工 | 20 | 80 | |
男员工 | 40 | 60 | |
合计 | 100 | 40 | 140 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08d8cc59e4abb030133eb20110cab33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f4d3ab5f8ec8405fe32fd181ce32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.10 | 0.05 | 0.025 | 0.001 | |
2.706 | 3.841 | 5.024 | 6.635 |
葡萄糖溶液体积![]() | 2 | 4 | 6 | 8 | 10 | 12 |
硫代硫酸钠体积![]() | 0.90 | 2.50 | 3.50 | 4.70 | 6.00 | 7.24 |
参考数据 | ||||||
![]() | ![]() | ![]() | ||||
217.28 | 24.84 | 364 |
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/e4d3c677-f1b2-4c97-a94a-722ce213fb4e.png?resizew=225)
(1)由如图散点图可知,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)某工厂抽取产品样本进行检测,所用的硫代硫酸钠溶液大约为2.90mL,则该样本中所含的还原糖大约相当于多少体积的标准葡萄糖溶液?
附:回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ec30e9316c79d956b7c9a483a91632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb2b344751201b4398c0781b63d58b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180fb970fb496ffcba01056f4ae13a50.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/52740729-0109-4de3-abc9-b1241f5ff573.png?resizew=273)
(1)用一元线性回归模型拟合y与t的关系,求出相关系数r(精确到0.01),并说明y与t相关性的强弱;
(2)建立y关于t的回归直线方程;
(3)若2023年该市某家庭总支出为10万元,预测2023年该家庭的教育支出.
附:①相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3dc3e2ed282378d22ee67ee5ca08f54.png)
②在回归直线方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f9a08ee8bc2746ce20df23b40fdb46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8deea9d0ed6af44cab0150a7761ebbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
月份 | 2022年5月 | 2022年6月 | 2022年7月 | 2022年8月 | 2022年9月 |
月份代码: | 1 | 2 | 3 | 4 | 5 |
销售量: | 45 | 56 | 64 | 68 | 72 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c3a88c2ca0c3d6773bb9b915b28d33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2991502b0be7df4183b9e42b6c53c6e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(2)求销售量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ddbddc0fde0100b4b34ca6a2bf73bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a206d70fb8588d1575c6dfbfb7d30939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f1f6188455a299d7b57a3f423d5624.png)
参考公式:相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb16efc462b888a96ddcd23b127686fb.png)
线性回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a29b7e6152fc0bd1e93b0d181d8572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbe7f95b5d89f9409ec24536da9e826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb525270c748eddaaecc4a549cca250e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a9622a53d958999eecaefc85597b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d28162b2a8309f0f7f193e733be414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043f0e4ce2dbf1e1ed19d5cafdaef78c.png)
x | 8 | 9 | 10 | 11 | 12 |
z | 2.5 | 4.5 | 5 | 5.5 | 7.5 |
则当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d21726b82e52bbd091c3d3279ba584.png)
A.![]() | B.![]() | C.![]() | D.![]() |