题目 #13669
- UUID
cc7766db-d266-46cc-a775-ea091336fd22- 来源
- A中考/2026江苏中考期末数学试卷+答案170.pdf 第 2-4 页,bbox
[30.0, 408.69, 562.09, 189.1] - 题型 / 学科
- comprehensive / math / JUNIOR
- 知识树
KT_JUNIOR_MATH_STANDARD- 难度
- 难度 2 / 5 简单 · 单一知识点
- QA 状态
- 存疑 / 待修复 重试 0 次,得分 0.933
- 最终题 ID
- -
- 错误
- QA failed: SOLVER,CRITIC,COHERENCE,ANSWER
最终题干渲染(f_body 预览)
某校七、八年级各有300 名学生,近期对 他们“2020 年新型冠状病毒”防治知识进 行了线上测试,为了解他们的掌握情况, 从七、八年级各随机抽取了50 名学生的成 绩(百分制),并对数据(成绩)进行整理、 描述和分析,下面给出了部分信息: a.七年级学生成绩的频数分布直方图如下 (数据分为5 组:50 x 60 、 60 x 70 、 70 x 80 、80 x 90 、90 x 100): [整理数据] b.七年级学生成绩在80≤x<90 这一组的 是: c.七、八年级学生成绩的平均数、中位数 、众数如下: 根据以上信息,回答下列问题: 对比,得下表: 你认为哪所学校的教学效果较好?结合数 2026-06-21 到多少分的学生才能入选;



(1)将抽取的48 名学生的成绩进行分组, 绘制频数分布表和成绩分布扇形统计图(不 完整)如下: 请根据图表中数据填空: ①C 类和D 类部分的扇形圆心角度数分别 为_____________、_____________; ②估计全年级A、B 类学生一共有____名;
(2)学校为了解其他学校教学情况,将同层 次的第一、第二两所中学的抽样数据进行
(3)表中m 的值为____________;
(4)在随机抽样的学生中,防治知识成绩为 84 分的学生,在_________年级排名更靠 前,理由是 ___________________________________;
(5)若各年级防治知识的前90 名将参加线 上防治知识竞赛,预估七年级分数至少达
(6)若85 分及以上为“优秀”,请估计七 年级达到“优秀”的人数.




| ①理解以上知识点 | ②抄写以上内容两遍 |
|---|---|
| 【典例 1】 某校七、八年级各有 300 名学生,近期对 他们“2020 年新型冠状病毒”防治知识进 行了线上测试,为了解他们的掌握情况, 从七、八年级各随机抽取了 50 名学生的成 绩(百分制),并对数据(成绩)进行整理、 描述和分析,下面给出了部分信息: a.七年级学生成绩的频数分布直方图如下 (数据分为 5 组:50 x60、60 x70、 70 x80、80 x90、90 x100): | 【典例 2】 期末考试后,某市第一中学为了解本校九 年级学生期末考试数学学科成绩情况,决 定对该年级学生数学学科期末考试成绩进 行抽样分析,已知九年级共有 12 个班,每 班 48 名学生,请按要求回答下列问题: [收集数据] (1)若要从全年级学生中抽取一个 48 人的 样本,你认为以下抽样方法中比较合理的有 ;(填写序号) __________ ①随机抽取一个班级的 48 名学生; ②在全年级学生中随机抽取 48 名学生; ③在全年级 12 个班中分别各抽取 4 名学 生; ④从全年级学生中随机抽取 48 名男生; |
|---|
| b.七年级学生成绩在 80≤x<90 这一组的 是: c.七、八年级学生成绩的平均数、中位数 、众数如下: 根据以上信息,回答下列问题: (1)表中 m 的值为 ; ____________ (2)在随机抽样的学生中,防治知识成绩为 84 分的学生,在 年级排名更靠 _________ 前,理由是 ; ___________________________________ (3)若各年级防治知识的前 90 名将参加线 上防治知识竞赛,预估七年级分数至少达 | [整理数据] (2)将抽取的 48 名学生的成绩进行分组, 绘制频数分布表和成绩分布扇形统计图(不 完整)如下: 请根据图表中数据填空: ①C 类和 D 类部分的扇形圆心角度数分别 为 、 ; _____________ _____________ ②估计全年级 A、B 类学生一共有 名; ____ (3)学校为了解其他学校教学情况,将同层 次的第一、第二两所中学的抽样数据进行 对比 ,得下表: 你认为哪所学校的教学效果较好?结合数 |
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(1)将抽取的48 名学生的成绩进行分组, 绘制频数分布表和成绩分布扇形统计图(不 完整)如下: 请根据图表中数据填空: ①C 类和D 类部分的扇形圆心角度数分别 为_____________、_____________; ②估计全年级A、B 类学生一共有____名;
(2)学校为了解其他学校教学情况,将同层 次的第一、第二两所中学的抽样数据进行
(3)表中m 的值为____________;
(4)在随机抽样的学生中,防治知识成绩为 84 分的学生,在_________年级排名更靠 前,理由是 ___________________________________;
(5)若各年级防治知识的前90 名将参加线 上防治知识竞赛,预估七年级分数至少达
(6)若85 分及以上为“优秀”,请估计七 年级达到“优秀”的人数.
答案 / 解析
答案(f_answer)
82
解析(f_ways)
(1)七年级共有50 名学生,第25、26 名 学生的成绩为82 分、82 分,所以 82 82 m 82 (分),故答案为82; 2 (2)在七年级排名更靠前,理由如下: 因为七年级的中位数是82 分,八年级的中 位数是85 分,所以该学生的成绩大于七年 级成绩的中位数,而小于八年级成绩的中 位数,所以在七年级排名更靠前, 故答案为七,该学生的成绩大于七年级成 绩的中位数,而小于八年级成绩的中位 数; (3)根据题意得^{90} 50 15,则在抽取的 300 50 名学生中,必须有15 人参加线上防治 知识竞赛,所以至少达到89 分才能入选, 故答案为89; (4)根据题意得300\(\frac{13}{50}\)120 (人), 7 所以七年级达到优秀的人数约为120 人.
原图与资产(4)
审计记录
| 阶段 | 审计器 | 结果 | 得分 | 依据(简短) |
|---|---|---|---|---|
| STRUCTURE | structure-rule | PASS | 0.900 | |
| FORMULA | formula-auditor | PASS | 1.000 | |
| KNOWLEDGE | knowledge-auditor | WARN | - | |
| SOLVER | blind-solver | WARN | 0.400 | |
| CRITIC | critic | WARN | 0.500 | |
| VISION | vision-auditor | PASS | 0.950 | |
| SYMBOLIC | symbolic-auditor | WARN | 0.500 | |
| COHERENCE | coherence-rule | FAIL | 0.300 | |
| QUALITY_GATE | quality-gate | FAIL | 0.933 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
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| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
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| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
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| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
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| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 | |
| RETRO_REPAIR | retro-deterministic | FAIL | 0.300 |
知识点(0)
无
事件
| 时间 | 阶段 | 级别 | 消息 |
|---|---|---|---|
| 2026-09-22 21:18:15 | QA_TERMINAL | WARN | question terminal status=QUARANTINED: /data/qbank/quarantine/16de2e24-a616-456b-83c5-3364ab6bd928/question_cc7766db-d266-46cc-a775-ea091336fd22.json |
| 2026-09-22 21:18:15 | QA | WARN | QA: FAIL (score=0.933) |
| 2026-09-22 21:14:19 | FORMULA | WARN | 公式转换未确认,保留原文本: solution |