[機統] 請問這題要如何解
Ｍax runs a sales team of 50 people for Brim Bram International and
looks at the record of his existing employees.
He finds that 20 % of them achieved sales of less than $10,000 last month,
24% of the sales force have been with BrimBram for less than 6 months and
30% of the sales force have not yet returned their expenses claims for
last months .
He dicides to interview all of the people who are in all three groups.
It turns out that there are 4 people to be interviewed.
what does this tell about the correlation ( or alternatively independence )
between these characteristics?
我的理解是Ｐ（Ａ）＝0.2
我的理解是這樣
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