Probability by Association Rules

[Alanma]

What is the probability that an email without the word ‘Free’ in its subject
line is spam?

29 over total 70

b.What is the probability that an email without the word ‘Sale’ in its subject
line is spam?
16 over total of 64?
do these make sense ?or am I thinking it about the wrong way?


c. What single property (e.g. the word ‘Free’ is in the subject line) is the most
likely to indicate that an email is spam (hint: use association rules)?

i dont understand this can you explain the answer

d.What property (i.e. over all possible single or combination) is the most
likely to indicate that an email is spam?

explain answee

 

[Dr.Peterson]

Your answers for the first two parts are correct.

Can you state what you mean by "association rules"? I am not familiar with the term, but might recognize what you mean if I saw the definition.

Ignoring the hint, I would just calculate the probability of spam for each of the two properties, and pick the largest. For part (d), I'd compare the four pairs similarly. But I'd want to think about exactly what the question means, and seeing what you have been taught might help.