Very quick question - which statistical test to use?

I survey 50 people on their level of happiness (high / low / neutral)
I then deliver a therapy course to these 50 people.
I then survey these 50 people again on their level of happiness (high / low / neutral)
Of the 50 people, 4 report a higher level of happiness.
What statistical test would quantify whether this 4 out of 50 represents a signficant effect? And is there a site where I can enter the data to calculate this?

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Mathe Mathe
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