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請大家幫一幫我,好嗎 ? 有趣的數學問題

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A company has ordered a large batch of LCD panels for producing PDAs. Upon arrival, the panels are to be sampled to estimate the proportion of defective items. It is expected the true proportion of defective items be estimated to within + 0.05 and -0.05 with 95% confidence.How large a random sample should be... 顯示更多 A company has ordered a large batch of LCD panels for producing PDAs. Upon arrival, the panels are to be sampled to estimate the proportion of defective items. It is expected the true proportion of defective items be estimated to within + 0.05 and -0.05 with 95% confidence. How large a random sample should be taken if no prior information about the true proportion is available ? How large a random sample should be taken if, from past experience, the true proportion is believed to lie within 0.05 and 0.075 ? If k= Zo.o1 which of the followings is true? (A)k = 2.33 (B)k = -2.33 更新: 煩請請各位列公式 好多謝啊 ! ^_^

最佳解答:

A company has ordered a large batch of LCD panels for producing PDAs. Upon arrival, the panels are to be sampled to estimate the proportion of defective items. It is expected the true proportion of defective items be estimated to within + 0.05 and -0.05 with 95% confidence. How large a random sample should be taken if no prior information about the true proportion is available ? How large a random sample should be taken if, from past experience, the true proportion is believed to lie within 0.05 and 0.075 ? If k= Zo.o1 which of the followings is true? (A)k = 2.33 (B)k = -2.33

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