• H0: Null Hypothesis ("no effect")
  • HA: Alternative Hypothesis ("some effect")
True state of affairs
H0 HA
What we claim H0 Correct Non-Rejection [of H0] Miss
(Type II Error)
HA False Alarm
(Type I Error)
Correct Rejection [of H0]

Part of Dr. Doug Elrod's Theory Behind the t-Test Talk