Shewhart-Type Charts for Masked Data: A Strategy for Handling the Privacy Issue

Figure 1

Comparison of proposed charts for different shifts, δ, and masking, . (a) δ = 0.15. (b) δ = 0.25. (c) δ = 0.5. (d) δ = 0.75. (e) δ = 1.5. (f) δ = 2.0.

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