Wilcoxon signed-ranks large sample example

A hostel consistently receives high ratings from its visitors and has many repeat visitors. On its comment card, it asks visitors to rate overall satisfaction on a scale from 1 to 5, 5 being best. The hostel changed its décor. It had 19 visitors who visited before and after the changes. These were the results:

Visitor	1	2	3	4	5	6	7	8	9	10
Before	5	5	5	3	4	3	3	5	5	5
After	2	1	3	4	4	2	1	4	5	2
Visitor	11	12	13	14	15	16	17	18	19
Before	4	3	4	4	3	4	5	4	4
After	3	1	1	5	5	2	4	2	3

Is there a significant decrease in the ratings? Test at a 1% level of significance.

Here is the Megastat output:

Wilcoxon Signed Rank Test
	variables:	Before - After
	134.5	sum of positive ranks
	18.5	sum of negative ranks
	17	n
	76.50	expected value
	21.12	standard deviation
	2.75	z
	.0030	p-value (one-tailed, upper)