Ryan is growing 10 saplings in a greenhouse, labeled A thru J. He makes these observations about their height:

1. For each sapling, what was the difference in height from 5/1 to 5/7?
2. What was the mean average of the differences in height for all saplings A thru J?
3. What was the standard deviation of the differences in height for all saplings A thru J?
4. What is the sample size in this situation?

Ryan is growing 10 saplings in a greenhouse, labeled A thru J. He makes these observations about their height: Day A B C D E F G H - 5/1 12 13 10 11 10 10 12 8 11 11 5/7 13 13 11 12 10 11 13 8 11 12