Math Problem Statement
九個元件經壽命檢驗,其故障時間分別如下:9.3×10 10.0×10 10.9×10 9.4×10 10.0×10 9.6×10 10.3×10 9.8×10 10.7×10假設上述之耗損故障模式可以常態分配表示之,其變異數(σ)已知為4×10hr,求信賴水準至少為90%,可靠度為0.99時,必須更換這些組件之時間為:(A) 5.34×10 (B) 4.49×10 (C)10.00×10 (D)5.34×10。
Solution
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Math Problem Analysis
Mathematical Concepts
Normal Distribution
Reliability Engineering
Statistical Analysis
Formulas
Standard Normal Distribution
Reliability Calculation Formula
Theorems
Central Limit Theorem
Suitable Grade Level
Advanced
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