The regression equation is y=11.18-0.48X, the sample size is 12, and
the standard error of the slope is 0.23. Use the .05 significance level.
Can we conclude that the slope of the regression line is less than zero?
EX.26) The owner of Maumee Ford-Mercury-Volvo wants to study
the relationship between the age of a car and its selling price. Listed
below is a random sample of 12 used cars sold at the dealership
during last year.
a) Determine standard error of estimation.
b) Determine the coefficient of determination.
c) Interpret the coefficient of determination
Chapter 14:
Ex 2) Thompson photo Works purchased several new, highly
sophisticated processing machines. The production department
needed some guidance with respect to qualification needed by an
operator. Is age a factor? Is the length of service as an operator
important? In order to explore further the factors needed to estimate
performance on the new processing machines, four variables were
listed?
X1 = Length of time an employee was in industry
X2= Mechanical aptitude test score
X3= Prior on-the-job rating
X4= Age
Performance on the new machine is designated y.
a. What is this equation called?