Final answer:
In a 95% confidence interval, α/2 is 0.025 or 2.5 percent, which represents the probability in each tail of the distribution.
Step-by-step explanation:
The value of α/2 in a 95% confidence interval is 0.025 or 2.5 percent.
A 95% confidence interval contains 95% of the probability, and excludes 5%.
The 5% excluded is split evenly between the upper and lower tails of the distribution.