Given the following utility matrix, representing the ratings, on a 1–5 star scale, of eight items,...

Given the following utility matrix, representing the ratings, on a 1–5 star scale, of eight items, a through h, by three users A, B, and C:

	a	b	c	d	e	f	g	h
A	4	5		5	1		3	2
B		3	4	3	1	2	1
C	2		1	3		4	5	3

After we normalize the matrix by subtracting from each nonblank entry the average value for its user, what is the cosine distance between users A and C ?

		-0.1155
		0.5842
		0.3334
		-0.7396

Expert Solution

comment for any doubt

Colby Messinger answered 2 years ago

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