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# CH20 - Statistics Assignment CH20 20.1 Period Time series...

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20.1 Period Time series Moving average 1 48 2 41 48+41+37)/3 = 42.00 3 37 41+37+32)/3 = 36.67 4 32 37+32+36)/3 = 35.00 5 36 32+36+31)/3 = 33.00 6 31 36+31+43)/3 = 36.67 7 43 31+43+52)/3 = 42.00 8 52 43+52+60)/3 = 51.67 9 60 52+60+48)/3 = 53.33 10 48 60+48+41)/3 = 49.67 11 41 48+41+30)/3 = 39.67 12 30 20.2 Period Time series Moving average 1 48 2 41 3 37 (48+41+37+32+36)/5 = 38.8 4 32 (41+37+32+36+31)/5 = 35.4 5 36 (37+32+36+31+43)/5 = 35.8 6 31 (32+36+31+43+52)/5 = 38.8 7 43 (36+31+43+52+60)/5 = 44.4 8 52 (31+43+52+60+48)/5 = 46.8 9 60 (43+52+60+48+41)/5 = 48.8 10 48 (52+60+48+41+30)/5 = 46.2 11 41 12 30 20.3 20.7 Period  Time series Exponentially smoothed time series 1 12 12 2 18 .1(18) +. 9(12) = 12.60 Statistics Assignment  CH 20 11 9670103 1 2 3 4 5 6 7 8 9 10 11 12 20 40 60 Moving Average Column B Column C Column D Period Time series

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3 16 .1(16) +. 9(12.60) = 12.94 4 24 .1(24) +. 9(12.94) = 14.05 5 17 .1(17) +. 9(14.05) = 14.34 6 16 .1(16) +. 9(14.34) = 14.51 7 25 .1(25) +. 9(14.51) = 15.56 8 21 .1(21) +. 9(15.56) = 16.10 9 23 .1(23) + .9(16.10) = 16.79 10 14 .1(14) + .9(16.79) = 16.51 20.8 Period Time series Exponentially smoothed time series 1 12 12 2 18 .8(18) +. 2(12) = 16.80 3 16 .8(16) +. 2(16.80) = 16.16 4 24 .8(24) +. 2(16.16) = 22.43 5 17 .8(17) +. 2(22.43) = 18.09 6 16 .8(16) +. 2(18.09) = 16.42 7 25 .8(25) +. 2(16.42) = 23.28 8 21 .8(21) +. 2(23.28) = 21.46 9 23 .8(23) + .2(21.46) = 22.69 10 14 .8(14) + .2(22.69) = 15.74 20.15 a.
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CH20 - Statistics Assignment CH20 20.1 Period Time series...

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