A particular article used a multiple regression model with the following four independent variables. y = error percentage for subjects reading a four-digit liquid crystal display x1 = level of backlight (from 0 to 122 cd/m) x2 = character subtense (from .025 to 1.34) x3 = viewing angle (from 0 to 60) x4 = level of ambient light (from 20 to 1500 lx) The model equation suggested in the article is given below. (a) Assume that this is the correct equation. What is the mean value of y when x1 = 30, x2 = 0.6, x3 = 50 and x4 = 150? (b) What mean error percentage is associated with a backlight level of 40, character subtense of 0.6, viewing angle of 20, and ambient light level of 30?
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
A particular article used a multiple regression model with the following four independent variables.
x1 = level of backlight (from 0 to 122 cd/m)
x2 = character subtense (from .025 to 1.34)
x3 = viewing angle (from 0 to 60)
x4 = level of ambient light (from 20 to 1500 lx)
The model equation suggested in the article is given below.
(b) What mean error percentage is associated with a backlight level of 40, character subtense of 0.6, viewing angle of 20, and ambient light level of 30?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
