At a used dealership, let X be an independent variable representing the age in years of a motorcycle and Y be the dependent variable representing the selling price of used motorcycle. The data is now given to you. X = {5, 10; 12, 14, 15} Y = {500, 400, 300, 200, 100} A) Estimate the parameters of the model B) Write the prediction equation C) Calculate SSE.

a)

Alpha (α) = 728.02

Beta (β) = -38.22

b) The prediction equation is:

Y = 728.02 - 38.22 X

c)

SSE = 8280.25

Step-by-step explanation:

Since X is the independent variable (which is representing the age in years of a motorcycle), and Y is the dependent variable (which is representing the selling price of used motorcycle).

Then, we can infer that, the model is a linear regression model. Hence we fit the equation below:

                                            Y = α + β X + ε

Where:

α & β are the parameters of the model. Mathematically,

α =

,

By:

As given, we can obtain all the information from the data given. However, to make it fast, please see the R codes for the solution below:

#######################################################

#.......................................              R codes              .................................................#

X = c(5, 10, 12, 14, 15)

Y = c(500, 400, 300, 200, 100)

mod = lm(Y~X)

summary(mod)# ... this produce all the model results

aov(mod)#.. this produce the SSE

anova(mod)#.. this produce the SSE

########################################################

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.