Example: Wrong Decision Due to Wrong Analysis

Paired T for AFTER - BEFORE

N Mean StDev SE Mean

AFTER 4 82.00 12.96 6.48

BEFORE 4 71.00 15.87 7.94

Difference 4 11.00 5.03 2.52

95% CI for mean difference: (2.99, 19.01)

T-Test of mean difference = 0 (vs not = 0): T-Value = 4.37

P-Value = 0.02

Conclude mean pulse rate after is greater than mean pulse rate before.