本课配套习题挑战模式1/5
单选题
难度系数:
1.为了考察某种小麦的长势,从中抽取了10株麦苗,测得苗高(单位:cm)为:
16 9 14 11 12 10 16 8 17 19
则这组数据的中位数和极差分别是( )
16 9 14 11 12 10 16 8 17 19
则这组数据的中位数和极差分别是( )
A: 13,16 |
B: 14,11 |
C: 12,11 |
D: 13,11 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS4reS9jeaVsOWPiuaegeW3rueahOWumuS5ieWIpOaWrQ==
- 答案:RA==
PGRpdj7op6PvvJrlsIbmlbDmja7ku47lsI/liLDlpKfmjpLliJfkuLrvvJo477yMOe+8jDEw77yMMTHvvIwxMu+8jDE077yMMTbvvIwxNu+8jDE377yMMTnvvIw8YnI+5Lit5L2N5pWw5Li677yaMTPvvJs8YnI+5p6B5beuPTE5LTg9MTE8L2Rpdj4=
本课配套习题挑战模式3/5
单选题
难度系数:
3.一组数据:3,2,1,2,2的众数,中位数,方差分别是( )
A: 2,1,0.4 |
B: 2,2,0.4 |
C: 3,1,2 |
D: 2,1,0.2 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOaJvuS4reS9jeaVsOimgeaKiuaVsOaNruaMieS7juWwj+WIsOWkp+eahOmhuuW6j+aOkuWIl++8jOS9jeS6juacgOS4remXtOeahOS4gOS4quaVsO+8iOaIluS4pOS4quaVsOeahOW5s+Wdh++8ieaVsOS4uuS4reS9jeaVsA==
- 提示2:IOS8l+aVsOaYr+S4gOe7hOaVsOaNruS4reWHuueOsOasoeaVsOacgOWkmueahOaVsOaNru+8jOazqOaEj+S8l+aVsOWPr+S7peS4jeWPquS4gOS4qg==
- 提示3:IOWIqeeUqOaWueW3ruWFrOW8j+iuoeeul+aWueW3rg==
- 答案:Qg==
PGRpdj7op6PvvJrku47lsI/liLDlpKfmjpLliJfmraTmlbDmja7kuLrvvJox77yMMu+8jDLvvIwy77yMM++8mzwvZGl2PjxkaXY+5pWw5o2uMuWHuueOsOS6huS4ieasoeacgOWkmuS4uuS8l+aVsO+8jDLlpITlnKjnrKwz5L2N5Li65Lit5L2N5pWwLiA8L2Rpdj48ZGl2PuW5s+Wdh+aVsOS4uu+8iDMrMisxKzIrMu+8icO3NT0y77yMPC9kaXY+PGRpdj7mlrnlt67kuLo8aW1nIHdpZHRoPTM3MiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wMC81Qy9yQkFDRkZNTVZDemd2WDg4QUFBRUJFaG5oR0k0NjYucG5nIj48L2Rpdj4=
本课配套习题挑战模式4/5
单选题
难度系数:
4.若数据2,x,4,8的平均数是4,则这组数据的极差和方差分别是( )
A: 6和6 |
B: 6和16 |
C: 4和24 |
D: 4和16 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOmmluWFiOagueaNruW5s+Wdh+aVsOiuoeeul+WHunjnmoTlgLw=
- 答案:QQ==
PGRpdj7op6PvvJrnlLHpopjmhI/lvpfvvJrvvIgyK3grNCs477yJw7c0PTTvvIw8YnI+6Kej5b6X77yaeD0y77yMPGJyPuaegeW3ruaYr++8mjgtMj0277yMPC9kaXY+PGRpdj7mlrnlt67vvJo8aW1nIHdpZHRoPTI5NSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC81Qy9yQkFDRkZNTVZET0ItTUZTQUFBRGhFR2ZyTTQxNDMucG5nIj48L2Rpdj4=
本课配套习题挑战模式5/5
单选题
难度系数:
5.
若样本的平均数为10,方差为2,则对于样本,下列结论正确的是( )
A: 平均数为10,方差为2 |
B: 平均数为11,方差为3 |
C: 平均数为11,方差为2 |
D: 平均数为12,方差为4 |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+5q+P5Liq5pWw5o2u6YO95YqgYe+8jOWImeW5s+Wdh+aVsOWKoGE8L3A+
- 提示2:PHA+5q+P5Liq5pWw5o2u6YO95ZCM5Yqg5LiKYe+8jOi/mee7hOaVsOaNrueahOazouWKqOayoeacieWPmOWMlu+8jOaWueW3ruS4jeWPmDwvcD4=
- 答案:Qw==
PGRpdj7op6PvvJrmr4/kuKrmlbDmja7pg73liqBh77yM5YiZ5bmz5Z2H5pWw5YqgYe+8m+avj+S4quaVsOaNrumDveWQjOWKoOS4imHvvIzov5nnu4TmlbDmja7nmoTms6LliqjmsqHmnInlj5jljJbvvIzmlrnlt67kuI3lj5g8L2Rpdj4=