Answer:
5.4
Step-by-step explanation:
add all pieces of data together, you get 49. Since there are 9 pieces of data, we divide by 9. 49/9 is 5.4444 repeated, but if you round it to the nearest tenth, but since it's less than 5, you round down to 5.4 and not 5.5. In conclusion, the mean is 5.4
