The uncertainty in each measured value of K is about + 10%. Are all of your measured values of K within the range (+ 10%) of the average K value?

My K values are 343, 342, 341, and 344. My average is 342. I used 3 significant digits. How do I answer this question? I know I am dumb but need help.

All look withing 10% to me.

343
342
341
avg = 342
[(344-342)/342]*100 = ?