hw2 - AMS316 Homework#2 1. The following data show the...

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AMS316 Homework#2 1. The following data show the coded sales of company X in successive 4-week periods over 1995-1998. ⅩⅠ ⅩⅡ ⅩⅢ 1995 153 189 221 215 302 223 201 173 121 106 86 87 108 1996 133 177 241 228 283 255 238 164 128 108 87 74 95 1997 145 200 187 201 292 220 233 172 119 81 65 76 74 1998 111 170 243 178 248 202 163 139 120 96 95 53 94 (a) Plot the data. (b) Assess the trend and seasonal effects. 2. Sixteen successive observations on a stationary time series are as follows: 1.6, 0.8, 1.2, 0.5, 0.9, 1.1, 1.1, 0.6, 1.5, 0.8, 0.9, 1.2, 0.5, 1.3, 0.8, 1.2. (a) Plot the observations. (b) Looking at the graph plotted in (a), guess an approximate value for the autocorrelation coefficient at lag 1. (c) PlotError: Reference source not foundagainst Error: Reference source not found and try to guess the value of Error: Reference source not found. (d) Calculate Error: Reference source not found.
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hw2 - AMS316 Homework#2 1. The following data show the...

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