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In association rules, given items X and Y, what does lift measure?
Suggested Answer: D
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31 comments · newest first
VA
Valene
10 months ago
Wait, isn't lift just another way to say correlation?
PE
Pearlene
10 months ago
Totally agree, it's all about that ratio!
LO
Lottie
10 months ago
Nope, lift is more specific than just correlation!
LE
Leslie
10 months ago
Really? I thought it was just about percentages.
TE
Teresita
11 months ago
Lift measures the ratio of how often X and Y occur together compared to if they were independent.
IL
Ilene
11 months ago
I vaguely remember that lift indicates how much more often X and Y occur together than expected, so I think option D sounds right, but I need to double-check my notes.
IZ
Izetta
11 months ago
I feel like lift is about the relationship between X and Y, but I can't recall if it's the difference or the ratio. Maybe I should go with option C since it mentions probability.
LA
Lavelle
11 months ago
I remember practicing a similar question, and I think lift is related to the ratio of the joint probability to the individual probabilities. Could it be option D?
AL
Alisha
12 months ago
I think lift measures how much more likely X and Y are to occur together compared to if they were independent, but I'm not sure which option that is.
AR
Arthur
12 months ago
I'm a little confused by this question. Is lift related to the percentage of transactions that contain X, or the percentage of transactions with X that also have Y? I'll have to review my notes to make sure I understand the concept properly.
ME
Merri
12 months ago
Okay, I remember learning about lift in class. It's a measure of the difference between the actual probability of X and Y appearing together versus the expected probability if they were independent. I think option C is the right answer.
DA
Daron
1 year ago
Hmm, I'm a bit unsure about this one. I know lift has something to do with the probability of X and Y appearing together, but I can't quite remember the exact definition. I'll have to think this through carefully.
DO
Dorthy
1 year ago
I'm pretty sure lift measures how much more often X and Y occur together compared to if they were independent. I think it's option D.
CH
Cherilyn
1 year ago
Haha, I bet the answer is E) How many times the exam taker can lift a barbell with X and Y on it!
CE
Cecil
1 year ago
D) How many times more often X and Y occur together than expected if they were statistically independent, expressed as a ratio
BR
Britt
1 year ago
C) Difference in the probability of X and Y appearing together compared with expectations as if they were statistically independent
RO
Rodney
1 year ago
A) Percentage of transactions that contain an itemset with X
DO
Dominga
1 year ago
D seems like the best choice. It's the ratio of how often they occur together versus expected if independent.
LO
Lorita
1 year ago
Yes, D is the ratio of how often X and Y occur together compared to if they were independent.
AU
Audry
1 year ago
I agree, D is the correct choice for measuring lift.
BU
Bulah
1 year ago
I believe option C is also relevant, as it compares the probability of X and Y appearing together with expectations.
KA
Kanisha
1 year ago
I'm going with C. It's about the difference in probability compared to independence.
GA
Galen
1 year ago
I'm not sure, but I think it might be A. It's about the percentage of transactions containing X.
FR
Francesco
1 year ago
I agree with you, it's D. It's all about the ratio of occurrences compared to independence.
EL
Eladia
1 year ago
I think it's D. It measures how many times more often X and Y occur together than expected.
BO
Bonita
1 year ago
I agree with Ilda, that's option D. It's important in association rules to understand the relationship between items.
IL
Ilda
1 year ago
I think lift measures how many times more often X and Y occur together than expected if they were statistically independent.
DE
Deandrea
1 year ago
I think the correct answer is D. It measures how much more often X and Y occur together than expected if they were independent.
LA
Lawrence
1 year ago
Yes, that's right. It helps us understand the strength of the relationship between X and Y in association rules.
LO
Lonny
1 year ago
So, lift basically tells us how much more likely X and Y are to occur together than if they were independent.
NA
Na
1 year ago
I agree, the correct answer is D. It measures the ratio of how often X and Y occur together compared to if they were independent.