The article \"Readibility of liquid crystal displays: a response surface\" used

ID: 3396729 • Letter: T

Question

The article "Readibility of liquid crystal displays: a response surface" used a multiple regression model with four independent variables, where

y = error percentage for subjects reading a four digit liquid crystal display

x1 = level of blacklight (from 0 to 122 cd/m)

x2 = character substence (from .025 degrees to 1.34 degrees)

x3 = viewing angle (from 0 degrees to 60 degrees)

x4 = level of ambient light (from 20 to 1500 lx)

The model equation suggested in the article is

y = 1.52 + .02x1 - 1.40x2 + .02x3 - .0006x4 + e

Assume that this is the correct equation. What is the mean value of y when x1 = 10, x2 = .5 , x3 = 50 , x4 = 100?

The article "Readibility of liquid crystal displays: a response surface" used

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