1. Matched Pairs t Test
When you are comparing properties before and after a treatment is imposed on the same subjects or units (one population), then do a
one-sample t test on the difference of the two sets of data.
Ho : µ = 0
Ha : µ ≠ 0 or Ha : µ < 0 or Ha : µ > 0

2. Check your assumptions/conditions on the population of differences
Check your assumptions/conditions on the population of differences. This is because the t procedures are applied to these differences.
(conditions: srs, normal pop. or n ≥ 30, N>10n)
Lets do #26 p. 615
Assign:p.591 #4, p.597&598 #8 &10
p.604 #12 &13