总体方差未知时，可以用（ ）作为总体方差的估计值，实现对总体平均数的估计
未知类型：{'options': ['s', '[tex=0.857x1.286]PMv17YVGK7vUEp7RqB8+NQ==[/tex]', '[tex=2.214x1.429]gngb10Plk9jG6Z5pB+4OGw==[/tex]', '[tex=1.786x1.0]piJHJt+q5vcgTlNCHV0yrQ==[/tex]'], 'type': 102}
未知类型：{'options': ['s', '[tex=0.857x1.286]PMv17YVGK7vUEp7RqB8+NQ==[/tex]', '[tex=2.214x1.429]gngb10Plk9jG6Z5pB+4OGw==[/tex]', '[tex=1.786x1.0]piJHJt+q5vcgTlNCHV0yrQ==[/tex]'], 'type': 102}
举一反三
- 总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]DzIVuM/MGk4xQmlFQiODO0d4kwcRaAYJaDodsdcIbUVo8YFuB5n8BXzUWveK4Q9vXcDcZ8CiaeUVfGcuj5jkT+812iG22CCiZTzSmKIMLBc=[/tex]', '[tex=12.857x2.429]rIg8UNE5kyRqbvnR9dJdGRFDYfY64Z/y/PcdnwXfg70AMYD0xcpOkcmDaQCZr0SrVqllLfXnhymSWRVKqngimRc9iVAEuQaqZv9CkkZkqXA=[/tex]', '[tex=16.071x2.429]DzIVuM/MGk4xQmlFQiODOz0cvDQdwWo5dXcoU8p57aWlka/cHDJS0oj8E11Lzu6ZJ4Y7AbuJIrTuWErlqIQysqOp09WD8tWRLLySgXHKcTjhSQp8SP1AikT6db+PjQ6h[/tex]', '[tex=15.429x2.429]rIg8UNE5kyRqbvnR9dJdGS0zPoSmHwJ0ShWfeshmO8kU8mlwt7jytSzsYbjIbv9gInwZFoHw4bCecUs9/QUmgUb8TIFRr1shXJ+K9HInx2JdlfdAJkBGVuu2kRH9qwqW[/tex]'], 'type': 102}
- 总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]DzIVuM/MGk4xQmlFQiODO0d4kwcRaAYJaDodsdcIbUVo8YFuB5n8BXzUWveK4Q9vXcDcZ8CiaeUVfGcuj5jkT+812iG22CCiZTzSmKIMLBc=[/tex]', '[tex=12.857x2.429]rIg8UNE5kyRqbvnR9dJdGRFDYfY64Z/y/PcdnwXfg70AMYD0xcpOkcmDaQCZr0SrVqllLfXnhymSWRVKqngimRc9iVAEuQaqZv9CkkZkqXA=[/tex]', '[tex=16.071x2.429]DzIVuM/MGk4xQmlFQiODOz0cvDQdwWo5dXcoU8p57aWlka/cHDJS0oj8E11Lzu6ZJ4Y7AbuJIrTuWErlqIQysqOp09WD8tWRLLySgXHKcTjhSQp8SP1AikT6db+PjQ6h[/tex]', '[tex=15.429x2.429]rIg8UNE5kyRqbvnR9dJdGS0zPoSmHwJ0ShWfeshmO8kU8mlwt7jytSzsYbjIbv9gInwZFoHw4bCecUs9/QUmgUb8TIFRr1shXJ+K9HInx2JdlfdAJkBGVuu2kRH9qwqW[/tex]'], 'type': 102}
- 总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]DzIVuM/MGk4xQmlFQiODO0d4kwcRaAYJaDodsdcIbUVo8YFuB5n8BXzUWveK4Q9vXcDcZ8CiaeUVfGcuj5jkT+812iG22CCiZTzSmKIMLBc=[/tex]', '[tex=12.857x2.429]rIg8UNE5kyRqbvnR9dJdGRFDYfY64Z/y/PcdnwXfg70AMYD0xcpOkcmDaQCZr0SrVqllLfXnhymSWRVKqngimRc9iVAEuQaqZv9CkkZkqXA=[/tex]', '[tex=16.071x2.429]DzIVuM/MGk4xQmlFQiODOz0cvDQdwWo5dXcoU8p57aWlka/cHDJS0oj8E11Lzu6ZJ4Y7AbuJIrTuWErlqIQysqOp09WD8tWRLLySgXHKcTjhSQp8SP1AikT6db+PjQ6h[/tex]', '[tex=15.429x2.429]rIg8UNE5kyRqbvnR9dJdGS0zPoSmHwJ0ShWfeshmO8kU8mlwt7jytSzsYbjIbv9gInwZFoHw4bCecUs9/QUmgUb8TIFRr1shXJ+K9HInx2JdlfdAJkBGVuu2kRH9qwqW[/tex]'], 'type': 102}
- 总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]DzIVuM/MGk4xQmlFQiODO0d4kwcRaAYJaDodsdcIbUVo8YFuB5n8BXzUWveK4Q9vXcDcZ8CiaeUVfGcuj5jkT+812iG22CCiZTzSmKIMLBc=[/tex]', '[tex=12.857x2.429]rIg8UNE5kyRqbvnR9dJdGRFDYfY64Z/y/PcdnwXfg70AMYD0xcpOkcmDaQCZr0SrVqllLfXnhymSWRVKqngimRc9iVAEuQaqZv9CkkZkqXA=[/tex]', '[tex=16.071x2.429]DzIVuM/MGk4xQmlFQiODOz0cvDQdwWo5dXcoU8p57aWlka/cHDJS0oj8E11Lzu6ZJ4Y7AbuJIrTuWErlqIQysqOp09WD8tWRLLySgXHKcTjhSQp8SP1AikT6db+PjQ6h[/tex]', '[tex=15.429x2.429]rIg8UNE5kyRqbvnR9dJdGS0zPoSmHwJ0ShWfeshmO8kU8mlwt7jytSzsYbjIbv9gInwZFoHw4bCecUs9/QUmgUb8TIFRr1shXJ+K9HInx2JdlfdAJkBGVuu2kRH9qwqW[/tex]'], 'type': 102}
- 总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]已知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkMGG6R8CGPJ5U7Fu+Jarjt+LooagvhadQrvrI/J4dmKn6ORncRY+0d3x2aVH72qZAg+84kyw+b9UmYVDLEHmfxD[/tex]', '[tex=12.857x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198n4xE0CnX2UcmnJLPSOuuPrAyCXHCiXfJSfdtqe/Ik7kOUtVombsb+cGQEYJliiTiETyu3cHGfhaQTX2RGyb3Mb[/tex]', '[tex=16.071x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkOH8tHzWRZRCmrsZPY5lgj57lUp++hLgB5zQ/Dn59gCfcUldu/46ohQ9r0B90q4QTbKmJpTJ4nswHvFqxc9ZDqd[/tex]', '[tex=15.429x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198m15jwH2O3Ma18RK8xeZ8osNljjtiR2a6joRlMKLlinCmYUeM2/WkFE3z4ZYpzNdtMz1OCH6bjsdYabZEYQpjcm[/tex]'], 'type': 102}