On the Existence and Uniqueness of the Maximum Likelihood Estimators of Normal and Lognormal Population Parameters with Grouped Data

Figure 4

Grouped data: 𝜏₁=−1.5, 𝜏₂=1, 𝜏₃=3.5, 𝜏₄=6, 𝜏₅=8.5. Type I left censored data: 𝜏=−1.5.

(a)

(b)