Thanks but there's no "REPORT ERROR" hyperlink at https://www.w3schools.com/html/tryit.asp?filename=tryhtml_attributes_single_double; that's where I found the "paragraps" typo (it's not at https://www.w3schools.com/html/html_attributes.asp).
(The incorrectly spelled) "paragraps" needs to be replaced with (the correctly spelled) " paragraphs" in the following line at https://www.w3schools.com/html/tryit.asp?filename=tryhtml_attributes_single_double:
<p>Move your mouse over the paragraps below to see the effect:</p>