Question

You think that your tree planting buddies are not sharpening their shovels often enough (or perhaps well enough). For 8 of your friends, you measure the number of trees they plant on Tuesday morning, Then you (who are a master shovel sharpener) sharpen each of their shovels during the evening so that they will have a razor sharp shovel the next morning. Then you measure the number of trees each of them plant on Wednesday morning. Do you have enough evidence (at ?=.05α=.05) to conclude that your expert sharpening increased their production?

Planter	Tuesday	Wednesday
Akeera	600	600
Batoul	1100	1200
Chloe	900	800
Dylan	800	1000
Ethan	1000	1100
Francisca	700	800
George	300	400
Hope	400	400

Answer 1