Using the "Part4Series.txt" time series
a. Construct a time series plot of the series and comment on things you see in it, such as signs ofnonstationarity or trends. Specify a model for the time series you see.
b. If you see a lack of stationarity in part (a), decide how to get to a stationary series, carry out theprocess, and then assess stationarity of the residuals, analyze the residuals to assess the adequacy ofyour model assumptions.
Part4Series.txt :
"x"
"1" 12.372423634972
"2" 4.73553924102366
"3" 26.0385462639883
"4" 13.559772394278
"5" 36.8876287170574
"6" 25.5037841648466
"7" 22.3647851360432
"8" 23.0517434537217
"9" 31.4291346298489
"10" 24.1899489775146
"11" 37.196162752421
"12" 30.1609226443057
"13" 36.568467191633
"14" 46.5937878421073
"15" 60.243414539076
"16" 43.4250366844916
"17" 45.1995590096761
"18" 55.8284460308095
"19" 45.7017346083465
"20" 70.8381946726231
"21" 66.1406175618297
"22" 77.2949946624805
"23" 85.9928081888813
"24" 78.5914847314385
"25" 79.6842585823681
"26" 82.6038403758247
"27" 80.4241611352273
"28" 85.7128543556878
"29" 85.4038420213785
"30" 106.336189714136
"31" 84.3233025662882
"32" 98.9142908219293
"33" 91.5693668633573
"34" 98.4007048280534
"35" 105.414886909685
"36" 82.2363815369607
"37" 119.469026529248
"38" 103.84489245357
"39" 114.49279777073
"40" 106.335256559231
"41" 131.321809310073
"42" 126.250022784584
"43" 118.545130298522
"44" 138.042010631687
"45" 148.758812496924
"46" 130.633423152611
"47" 155.865307949197
"48" 133.610861320572
"49" 160.80067918143
"50" 146.008026029198
"51" 171.202865351681
"52" 170.105572178773
"53" 154.838691355167
"54" 173.47061534944
"55" 183.452825544588
"56" 180.235597977778
"57" 169.957868788214
"58" 187.751323219951
"59" 166.155302590981
"60" 200.133955877968
"61" 178.525457505883
"62" 174.170858663875
"63" 166.371368577827
"64" 188.084420462219
"65" 210.875003099245
"66" 185.679231786443
"67" 208.700474148719
"68" 179.712486222025
"69" 199.612371813207
"70" 207.07085322123
"71" 202.574060791055
"72" 211.745535876031
"73" 221.253290036803
"74" 222.78023746771
"75" 209.810100584193
"76" 206.825073024465
"77" 226.339026169604
"78" 256.878465966947
"79" 257.606603599869
"80" 262.381337157654
"81" 245.234963113446
"82" 234.453198473956
"83" 261.063997527887
"84" 246.888090856897
"85" 251.996876877382
"86" 261.129729041632
"87" 251.096432355788
"88" 262.040069825526
"89" 284.948738098715
"90" 256.809542108852
"91" 261.046361422398
"92" 258.920477270885
"93" 276.84298599173
"94" 291.964242308061
"95" 297.297559097463
"96" 307.685444065015
"97" 291.947977884327
"98" 298.650842412674
"99" 294.502546132939
"100" 304.408495141393
"101" 305.867156649662
"102" 300.003950814037
"103" 305.750448795672
"104" 304.836551481753
"105" 314.73857080955
"106" 328.541938578023
"107" 317.532327856927
"108" 344.956738290707
"109" 312.400996159746
"110" 332.329535769899
"111" 315.384535833697
"112" 321.558703824894
"113" 340.05967668366
"114" 345.81012611772
"115" 325.568586131246
"116" 360.975688966514
"117" 371.739632192545
"118" 338.935675954498
"119" 357.013125051102
"120" 367.933200226035
"121" 384.742451178996
"122" 358.626877381734
"123" 347.021259951084
"124" 371.918646367921
"125" 388.166824499837
