Example: Wrong Decision Due to Wrong Analysis

Two sample T for AFTER vs BEFORE

N Mean StDev SE Mean

AFTER 4 82.0 13.0 6.5

BEFORE 4 71.0 15.9 7.9

95% CI for mu AFTER - mu BEFORE: ( -15.3, 37.3)

T-Test mu AFTER = mu BEFORE (vs not =): T = 1.07 P = 0.33

DF = 5

Conclude no difference in mean pulse rates before and after marching.