Math Problem Statement
对于流水线上生产的一大批二极管的输出电压进行了测定。经计算得知,它们的中位数为2.3V。 5 月8日上午,从该批随机抽取了400个二极管,对于它们的输出电压进行了测定。记X为输出电压 比2.3V大的电子管数,结果发现,X=258支。为了检测此时的生产是否正常。先要确定X的分布。 可以断言: A. X近似为均值是200,标准差是20的正态分布。 B. X近似为均值是200,标准差是10的正态分布。 C. X是(180,220)上的均匀分布。 D. X是(190,210)上的均匀分布。
Solution
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Math Problem Analysis
Mathematical Concepts
Probability
Statistics
Normal Distribution
Formulas
Binomial distribution
Normal distribution mean and standard deviation
Theorems
Central Limit Theorem
Suitable Grade Level
Advanced High School or College
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