本课配套习题挑战模式1/5
单选题
难度系数:
1.为了解中学300名男生的身高情况,随机抽取若干名男生进行身高测量,将所得数据整理后,画出频数分布直方图(如图). 估计该校男生的身高在169.5cm~174.5cm之间的人数有( )
A: 12 |
B: 48 |
C: 72 |
D: 96 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruebtOaWueWbvuaxguWHuui6q+mrmOWcqDE2OS41Y23vvZ4xNzQuNWNt5LmL6Ze055qE5Lq65pWw55qE55m+5YiG5q+U77yM54S25ZCO5LmY5LulMzAw77yM6K6h566X5Y2z5Y+vLg==
- 答案:Qw==
6Kej77ya5qC55o2u5Zu+5b2i77yM6Lqr6auY5ZyoMTY5LjVjbe+9njE3NC41Y23kuYvpl7TnmoTkurrmlbDnmoTnmb7liIbmr5TkuLrvvJo8YnI+PGltZyB3aWR0aD0xMDEgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNEIvRTgvckJBQ0UxTjFqRm53S2lnUkFBQUNIWU5yLV9nMDc3LnBuZyI+w5cxMDAlPTI0Je+8jDxicj7miYDku6XvvIzor6XmoKHnlLfnlJ/nmoTouqvpq5jlnKgxNjkuNWNt772eMTc0LjVjbeS5i+mXtOeahOS6uuaVsOaciTMwMMOXMjQlPTcy77yI5Lq677yJLiA8YnI+5pWF6YCJQy4g
本课配套习题挑战模式2/5
单选题
难度系数:
2.九年级(1)班共50名同学,如图是该班体育模拟测试成绩的频数分布直方图(满分为30分,成绩均为整数). 若将不低于29分的成绩评为优秀,则该班此次成绩优秀的同学人数占全班人数的百分比是( )
A: 20% |
B: 44% |
C: 58% |
D: 72% |
一次做对,真牛!
+5奖励规则>
- 提示1:IOmAmui/h+WIhuaekOebtOaWueWbvuW+l+WIsOS4jeS9juS6jjI55YiG55qE5Lq65pWw77yM5YWo54+t5YWx5Lq65pWw77yM5qC55o2u6aKR546HPTxpbWcgd2lkdGg9NjEgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMEYvRTAvckJBQ0ZGTjFqRnVDOTFhY0FBQUJWM1pIdXRNNzczLnBuZyI+6K6h566X6aKR546HLg==
- 答案:Qg==
6Kej77ya6YCa6L+H5YiG5p6Q55u05pa55Zu+5Y+v55+l5LiN5L2O5LqOMjnliIbnmoTlhbHmnIkyMuS6uu+8jOWFqOePreWFseaciTUw5Lq677yM5omA5LulPGltZyB3aWR0aD0xNSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wRi9FMC9yQkFDRkZOMWpGeVJzc09DQUFBQld5czFma0k4MjAucG5nIj7DlzEwMCU9NDQl77yM5pWF6YCJQi4g
本课配套习题挑战模式3/5
单选题
难度系数:
3.某频数分布直方图中,共有A、B、C、D、E五个小组,频数分布为10、15、25、35、10,则直方图中,长方形高的比为( )
A: 2﹕3﹕5﹕7﹕2 |
B: 1﹕3﹕4﹕5﹕1 |
C: 2﹕3﹕5﹕6﹕2 |
D: 2﹕4﹕5﹕4﹕2 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruWcqOmikeaVsOWIhuW4g+ebtOaWueWbvuS4re+8jOWwj+mVv+aWueW9oueahOmrmOihqOekuumikeaVsOW+l+WHuumVv+aWueW9oumrmOeahOavlOetieS6jumikeaVsOeahOavlC4=
- 答案:QQ==
6Kej77ya4oi15Zyo6aKR5pWw5YiG5biD55u05pa55Zu+5Lit77yM5bCP6ZW/5pa55b2i55qE6auY6KGo56S66aKR5pWw77yMPGJyPuKItOmVv+aWueW9oumrmOeahOavlOetieS6jumikeaVsOeahOavlO+8jDxicj7iiLTplb/mlrnlvaLnmoTpq5jnmoTmr5TkuLrvvJoxMO+8mjE177yaMjXvvJozNe+8mjEwPTLvvJoz77yaNe+8mjfvvJoyLiA8YnI+5pWF6YCJ77yaQS4g
本课配套习题挑战模式4/5
单选题
难度系数:
4.某校在七年级设立了六个课外兴趣小组,每个参加者只能参加一个兴趣小组. 下面是六个兴趣小组不完整的频数分布直方图和扇形统计图. 根据图中信息,可得下列结论不正确的是( )
A: 七年级共有320人参加了兴趣小组 |
B: 体育兴趣小组对应扇形圆心角的度数为96° |
C: 参加音乐兴趣小组的频率为15% |
D: 美术兴趣小组对应的圆心角的度数为72° |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruWPguWKoOe+juacr+Wwj+e7hOeahOS6uuaVsOaYrzY077yM5omA5Y2g55qE5q+U5L6L5pivMjAl77yM5o2u5q2k5Y2z5Y+v5rGC5b6X5oC75pWw77yM54S25ZCO5qC55o2u6aKR546H55qE5a6a5LmJ5Y2z5Y+v56Gu5a6a5Y+C5Yqg6Z+z5LmQ5YW06Laj5bCP57uE55qE6aKR546H77yM5Lul5Y+K5L2T6IKy5YW06Laj5bCP57uE5ZKM576O5pyv5YW06Laj5bCP57uE5a+55bqU5omH5b2i5ZyG5b+D6KeSLg==
- 答案:Qg==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.某校在“创新素质实践行”活动中,组织学生进行社会调查,并对学生的调查报告进行了评比. 如图是将某年级60篇学生调查报告进行整理,分成5组画出的频数分布直方图. 已知从左到右5个小长方形的高的比为1:3:7:6:3,那么在这次评比中被评为优秀的调查报告有(分别大于或等于80分为优秀,且分数为整数)( )
A: 18篇 |
B: 24篇 |
C: 25篇 |
D: 27篇 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNrjXkuKrlsI/plb/mlrnlvaLnmoTpq5jkuYvmr5TmsYLlh7rlkI7pnaLkuKTnu4TljaDnmoTnmb7liIbmr5TvvIzkuZjku6U2MOWNs+WPr+W+l+WIsOe7k+aenC4=
- 答案:RA==
6Kej77ya5qC55o2u6aKY5oSP5b6X77yaNjDDlzxpbWcgd2lkdGg9NzcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMEYvRTAvckJBQ0ZGTjFqR0tqZmJTMkFBQUItLThxc2hzNTA4LnBuZyI+PTI377yI56+H77yJ77yMPGJyPuWImeWcqOi/measoeivhOavlOS4reiiq+ivhOS4uuS8mOengOeahOiwg+afpeaKpeWRiuaciTI356+HLiA8YnI+5pWF6YCJRA==