[計量] Six amounts are given say 358$, ...
1. Given a = (m+p)^2 & b = (m-p)^2. If 3^a/3^b = 3^4, thenCol A: mp Col B: 1
Answer: C
2.Six amounts are given say 358$, 600$, 478$, 786$, 900$ & 983$.
These amounts represent the profit made by 6 people.
Out of these 6 values, there is error in 2 of them,
one has been increased by 120$
and one has been decreased by 120$ by mistake.,
Col A: Standard Deviation of the data given
Col B: Standard Deviation of the actual values (without error)
Answer: D? B?
這是目前最新的jj
但怎麼算呢？
實在受挫
煩請高手解惑
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