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MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Find the products of these laws for this data
Mean Deviation = ΣΤΙΧ; −X| n Mean squared deviations ; or Σ}(x – X) n 2 ;
Transcribed Image Text:Mean Deviation = ΣΤΙΧ; −X| n Mean squared deviations ; or Σ}(x – X) n 2 ;
Months Actual values Forecasting values 1 2 3. 4 5 6 7 8 138 136 152 127 151 130 119 153 ال ۱۸۰۱ 150.25 139.50 157.25 143.50 138.00 127.50 138.25 141.50 Tell 11
Transcribed Image Text:Months Actual values Forecasting values 1 2 3. 4 5 6 7 8 138 136 152 127 151 130 119 153 ال ۱۸۰۱ 150.25 139.50 157.25 143.50 138.00 127.50 138.25 141.50 Tell 11
Expert Solution
Step 1

From the given information,

  Actual values, Xi Forecasting values, Yi Xi-X¯ Yi-Y¯
  138 150.25 0.25 8.2812
  136 139.5 2.25 2.4688
  152 157.25 13.75 15.2812
  127 143.5 11.25 1.5312
  151 138 12.75 3.9688
  130 127.5 8.25 14.4688
  119 138.25 19.25 3.7188
  153 141.5 14.75 0.4688
Average X¯=138.25 Y¯=141.9688 ∑i=1nXi-X¯=82.5 ∑i=1nYi-Y¯=50.1876

 

Mean deviation=∑i=1nXi-X¯n=82.58=10.3125

Mean deviation=∑i=1nYi-Y¯n=50.18768=6.2735

Product:

Product=10.3125*6.2735             =64.695

 

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