[問題] 問兩個機率問題...謝謝高手
1.A factory produces 10 glass containers daily. It may be assumed that
there is a constant probability p=0.1 of producing a defective container.
Before these containers are stored they are inspected and the defective
ones are set aside. Suppose that there is a constant probability r = 0.1
that a defective container is misclassified. Let X equal the number of
containers classified as defective at the end of a production day.
(Suppose that all containers which are manufactured on a particular
day are also inspected on that day.) Compute P(X=2)=?
a. 0.1937
b. 0.1714
c. 0.2541
d. None of above.
2. What is the required discrimination of a comparator given a
tolerance of 0.005 and an accuracy ratio of 10:1?
第一題的答案 參考書好像是選 D 因為 C10取2*0.01^2*0.99^8 = 0.00415
可是我是選 B 因為 C10取2*0.09^2*0.91^8 = 0.1714
第二題的題目在寫什麼 有人可以解釋嗎 英文每個字都懂 組起來就不懂...><
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