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教育统计与测量（00452）
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教育统计与测量
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阐述编制成就测验题目的一般性建议。
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,总体标准差σ=6,求总体平均数μ的置信区间。">
数学测试成绩的总体分布为正态分布,σ已知,样本平均数的抽样分布是正态分布。当置信水平为0.95时,样本容量n=36,样本平均数
,总体标准差σ=6,求总体平均数μ的置信区间。
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某班级在一次测验中,语文的平均分为108.5,标准差为7.5;政治的平均分为78.6,标准差为6.8,请比较该班学生语文成绩和政治成绩差异程度的大小。(计算结果保留两位小数)
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简述标准分数的性质。
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平均数常被使用在哪些情形中?
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请求信息 : 2026-09-18 22:06:23 HTTP/2.0 GET : 20230611.cn/index/question/detail/id/379979.html
运行时间 : 0.070043s [ 吞吐率：14.28req/s ] 内存消耗：393.11kb 文件加载：143
查询信息 : 3 queries 0 writes
缓存信息 : 0 reads,1 writes
配置加载 : 78
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[ BEHAVIOR ] Run Closure @app_init [ RunTime:0.000021s ]
[ CACHE ] INIT File
[ BEHAVIOR ] Run \addons\alioss\Alioss @app_init [ RunTime:0.000363s ]
[ BEHAVIOR ] Run Closure @app_init [ RunTime:0.000382s ]
[ BEHAVIOR ] Run app\common\behavior\Common @app_init [ RunTime:0.000141s ]
[ LANG ] /www/wwwroot/learn/thinker/admin/thinkphp/lang/zh-cn.php
[ BEHAVIOR ] Run app\common\behavior\Common @app_dispatch [ RunTime:0.000018s ]
[ ROUTE ] array ( 'type' => 'module', 'module' => array ( 0 => 'index', 1 => 'question', 2 => 'detail', ), )
[ HEADER ] array ( 'accept-encoding' => 'gzip, br, zstd, deflate', 'user-agent' => 'Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)', 'accept' => '*/*', 'host' => '20230611.cn', 'content-length' => '', 'content-type' => '', )
[ PARAM ] array ( 'id' => '379979', )
[ LANG ] /www/wwwroot/learn/thinker/admin/public/../application/index/lang/zh-cn.php
[ BEHAVIOR ] Run app\common\behavior\Common @module_init [ RunTime:0.000156s ]
[ BEHAVIOR ] Run \addons\alioss\Alioss @module_init [ RunTime:0.000110s ]
[ BEHAVIOR ] Run \addons\user\User @upload_config_checklogin [ RunTime:0.000021s ]
[ BEHAVIOR ] Run \addons\alioss\Alioss @upload_config_init [ RunTime:0.000084s ]
[ BEHAVIOR ] Run \addons\summernote\Summernote @config_init [ RunTime:0.000130s ]
[ RUN ] app\index\controller\Question->detail[ /www/wwwroot/learn/thinker/admin/application/index/controller/Question.php ]
[ DB ] INIT mysql
[ VIEW ] /www/wwwroot/learn/thinker/admin/public/../application/index/view/question/detail.html [ array ( 0 => 'user', 1 => 'site', 2 => 'config', 3 => 'question', 4 => 'relatedQuestions', 5 => 'seo_title', 6 => 'seo_keywords', 7 => 'seo_description', ) ]
0.078394s
,总体标准差σ=6,求总体平均数μ的置信区间。