Question 20

A linear regression model is expressed as y ? ?₀+ ?₁x where ?₀ is the intercept and ?₁ is the slope of the line). The following equations can be used to compute the value of the coefficients ?₀ and ?₁.

Using the following set of data, find the coefficients ?₀ and ?₁rounded to the nearest thousandths place and the predicted value of y when x is 10.

{(-1 , 0),(0 , 2),(1 , 4),(2 , 5)}

What is the value of ?₁.

Answer:

Question 21

Not yet answered

Marked out of 1.00

Flag question

Question text

True/False: According to our textbook, residual plots are a useful tool for identifying clusters.

Select one:

True

False

Question 22

When data observations are placed into specific groups according to their observed characteristics this is known as: ______________

Select one:

a. Classification

b. Decision Tree Analysis

c. Clustering

d. Regression

Question 9

The sales of a company (in million dollars) for each year are shown in the table below, identify the linear regression model in the form y=mx+b.

x (year)	2005	2006	2007	2008	2009
y (sales)	12	19	29	37	45

NOTE: You should consider the value x as the elapsed time. For 2005 this would be 0 years, for 2006 it would be 1 year and for 2012 it would be 7 years.

What is the predicted value of y (in millions of dollars) when the year is 2012?

Answer:

Question 10

The following diagram represents which technique?

Select one:

a. Linear Regression

b. Curvilinear Regression

c. Spline Regression

d. Polynomial curve fitting

Question 11

A linear regression model is expressed as y ? ?₀+ ?₁x where ?₀ is the intercept and ?₁ is the slope of the line). The following equations can be used to compute the value of the coefficients ?₀ and ?₁.

Using the following set of data, find the coefficients ?₀ and ?₁rounded to the nearest thousandths place and the predicted value of y when x is 10.

{(-1 , 0),(0 , 2),(1 , 4),(2 , 5)}

What is the value of y.

Answer:

72 B1 Tl