Based on least squared regression method find the projections for the years 2021, 2022, and 2023. Plot the number of sold cars versus years (points graph) and show the trend line based on your projections.

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter4: Linear Functions
Section: Chapter Questions
Problem 28PT: For the following exercises, use Table 4 which shows the percent of unemployed persons 25 years or...
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  • For the following list of data (number of sold cars in every year ) , apply “exponential smoothing with trend” for all the years below. (i.e find the Forecast including trend) :

---- case1  use :  α= 0.01     and β = 0.3

---- case2  use:   for  α= 0.1     and β = 0.05

Calculate MAD for both cases 

Decide which case values are better and why?

Assume trend is zero for the 2012 years.

 

Year

Number of sold cars

2012

110

2013

123

2014

160

2015

133

2016

151

2017

175

2018

189

2019

211

2020

255

 

  • Based on least squared regression method find the projections for the years 2021, 2022, and 2023. Plot the number of sold cars versus years (points graph) and show the trend line based on your projections. 
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