Refer to Example 21 concerning spam but now suppose that a new list is available. Among the

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Refer to Example 21 concerning spam but now suppose that a new list is available. Among the 1000 messages, the 350 spam messages have 310 that contain words on this list and the 650 normal messages have 70 that contain words on the list.
(a) Obtain the probability that a message is spam given that the message contains certain words.
(b) Would you prefer the list here or the one in Example 21? Why?
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Statistics Principles And Methods

ISBN: 9780470904114

7th Edition

Authors: Richard A. Johnson, Gouri K. Bhattacharyya

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