对于方差[tex=1.0x1.214]+33urkkz3/Nyr4sGrqM3/w==[/tex]为已知的正态总体, 问抽取容量[tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]为多大的样本, 才能使得总体平均数[tex=0.643x1.0]hK6dRoCn+OGpoJ7dSqNW4g==[/tex] 的置信水平为[tex=1.929x1.143]V8f+Jp4psc0MzW1b9OgWvA==[/tex]的置信区问的长度不大于[tex=0.714x1.0]Hl8mr56J4t0Ek5ZoqbFYYg==[/tex] ?
举一反三
- 设正态总体的方差[tex=2.286x1.214]mlCLJzHY8N/JicvePyDn0w==[/tex],问抽取的样本容量[tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]应为多大,才能使总体均值[tex=0.643x1.0]hK6dRoCn+OGpoJ7dSqNW4g==[/tex]的置信水平为[tex=1.857x1.143]sbGJwUcEz4//3QlU/contQ==[/tex] 的置信区间长不超过1.
- 设总体[tex=0.857x1.0]N7iCrOsS+NNEUUlnsYCi1g==[/tex]期望为[tex=0.643x1.0]hK6dRoCn+OGpoJ7dSqNW4g==[/tex],方差为[tex=1.0x1.214]GilSi9YgeugkoLsL861XSA==[/tex],[tex=7.286x1.357]CVnIHALKpREOmNiXwIbJmodNMZqTBoL48emjuXjwKc+jHaWLIgewKV3m6u70tfgS[/tex]为来自此总体的样本,且样本容量[tex=0.643x0.786]SBMIs+VUk7//BOpfqlQl0w==[/tex]比较大,对于置信水平[tex=1.929x1.143]yh3n57YpM0RFxvBYRVe30A==[/tex],试利用极限定理在 [tex=1.0x1.214]is2UbljsPtfjclf+gawOQA==[/tex]已知的情况下建立[tex=0.643x1.0]hK6dRoCn+OGpoJ7dSqNW4g==[/tex]的近似的置信区间.
- 总体分布正态，总体方差[tex=1.0x1.214]+33urkkz3/Nyr4sGrqM3/w==[/tex]已知，从总体中随即抽取容量为[tex=1.0x1.286]0MzHtCQbgnSzLwp5O36txg==[/tex]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=16.429x2.429]NGVugV9+AEk3oU1SP4svOEnECjOfa5wuRy6CQxazRYM8WvGhMu6P3tNQq0vKDq/A+H/Y8/zVjc0Qct92MEHEUmUKrE5ytOk9/t8irypV98X1SpmMrLAJJ+pf8K1qazHMv0DSt+Pb6ktcS6JbrcmOTA==[/tex]', '[tex=15.714x2.429]ib9fAZyhfZrrKokwAkpDXYuYcqmy5Gn0p/aw1U1MndCPxYEnDuyCpdLzmTYjTSUmMg/dWkMzutY7vWFcZGMYtlo471SUiCbcWyvclesXprSivb7B8EGTp9X+7YOWP52O[/tex]', '[tex=13.786x2.429]NGVugV9+AEk3oU1SP4svOEnECjOfa5wuRy6CQxazRYPJLvYcNjmkq0bdBXh2UUDCEnk9jDB0qv20HZFfUsm8qFKy9OTTvy8a6QxNhHRe87juVT2evJbrUhN6Yll8iCbN[/tex]', '[tex=13.214x2.429]FAiqofCwiUaPO7pG6z2KugJY0bbWs0yI9/LWkSmka/2QnZ/WKrL3hlP+re5XNVEfGD7TmD020d9OsaBz7Q7aPDneV0JeG3a+r/Zuoh9rOcnoAyvKnTaVopQZi7lX6xr7[/tex]'], 'type': 102}
- 总体分布正态，总体方差[tex=1.0x1.214]+33urkkz3/Nyr4sGrqM3/w==[/tex]已知，从总体中随即抽取容量为[tex=1.0x1.286]0MzHtCQbgnSzLwp5O36txg==[/tex]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=16.429x2.429]NGVugV9+AEk3oU1SP4svOEnECjOfa5wuRy6CQxazRYM8WvGhMu6P3tNQq0vKDq/A+H/Y8/zVjc0Qct92MEHEUmUKrE5ytOk9/t8irypV98X1SpmMrLAJJ+pf8K1qazHMv0DSt+Pb6ktcS6JbrcmOTA==[/tex]', '[tex=15.714x2.429]ib9fAZyhfZrrKokwAkpDXYuYcqmy5Gn0p/aw1U1MndCPxYEnDuyCpdLzmTYjTSUmMg/dWkMzutY7vWFcZGMYtlo471SUiCbcWyvclesXprSivb7B8EGTp9X+7YOWP52O[/tex]', '[tex=13.786x2.429]NGVugV9+AEk3oU1SP4svOEnECjOfa5wuRy6CQxazRYPJLvYcNjmkq0bdBXh2UUDCEnk9jDB0qv20HZFfUsm8qFKy9OTTvy8a6QxNhHRe87juVT2evJbrUhN6Yll8iCbN[/tex]', '[tex=13.214x2.429]FAiqofCwiUaPO7pG6z2KugJY0bbWs0yI9/LWkSmka/2QnZ/WKrL3hlP+re5XNVEfGD7TmD020d9OsaBz7Q7aPDneV0JeG3a+r/Zuoh9rOcnoAyvKnTaVopQZi7lX6xr7[/tex]'], 'type': 102}
- 总体分布正态，总体方差[tex=1.0x1.214]+33urkkz3/Nyr4sGrqM3/w==[/tex]已知，从总体中随即抽取容量为[tex=1.0x1.286]0MzHtCQbgnSzLwp5O36txg==[/tex]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=16.429x2.429]NGVugV9+AEk3oU1SP4svOEnECjOfa5wuRy6CQxazRYM8WvGhMu6P3tNQq0vKDq/A+H/Y8/zVjc0Qct92MEHEUmUKrE5ytOk9/t8irypV98X1SpmMrLAJJ+pf8K1qazHMv0DSt+Pb6ktcS6JbrcmOTA==[/tex]', '[tex=15.714x2.429]ib9fAZyhfZrrKokwAkpDXYuYcqmy5Gn0p/aw1U1MndCPxYEnDuyCpdLzmTYjTSUmMg/dWkMzutY7vWFcZGMYtlo471SUiCbcWyvclesXprSivb7B8EGTp9X+7YOWP52O[/tex]', '[tex=13.786x2.429]NGVugV9+AEk3oU1SP4svOEnECjOfa5wuRy6CQxazRYPJLvYcNjmkq0bdBXh2UUDCEnk9jDB0qv20HZFfUsm8qFKy9OTTvy8a6QxNhHRe87juVT2evJbrUhN6Yll8iCbN[/tex]', '[tex=13.214x2.429]FAiqofCwiUaPO7pG6z2KugJY0bbWs0yI9/LWkSmka/2QnZ/WKrL3hlP+re5XNVEfGD7TmD020d9OsaBz7Q7aPDneV0JeG3a+r/Zuoh9rOcnoAyvKnTaVopQZi7lX6xr7[/tex]'], 'type': 102}