Lean Six Sigma Black Belt (LSSBB) — Question 7

Following process modifications, the Null Hypothesis states that no improvement to the process has occurred. If we discover the Null Hypothesis Test was rejected when it was false that would be a(n) ________________________.

Answer options

• A. Alpha Error
• B. Type I Error
• C. Type II Error
• D. Type III Error

Correct answer: C

Explanation

The correct answer is C, Type II Error, which occurs when the null hypothesis is not rejected even though it is false. In contrast, an Alpha Error and Type I Error refer to rejecting the null hypothesis when it is actually true, while Type III Error does not fit the context of hypothesis testing.