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WorksheetsChapter 4 - Time Series Unit 3
Total questions: 10
Worksheet time: 31mins
Using four-mean smoothing with centering, the smoothed profit for May is closest to
$2502
$3294
$3503
$3804
$4651
Using these sale figures, the seasonal index for quarter 3 is closest to
1.28
1.30
1.38
1.46
1.48
The time series is best described as having
seasonality only
irregular fluctuations only
seasonality with irregular fluctuations
a decreasing trend with irregular fluctuations
an increasing trend with irregular fluctuations
The seven-median smoothed maximum wind speed, in kilometres per hour, for day 4 is closest to
22
26
27
30
32
The seasonal index for the sales of cold drinks in a shop in January is 1.6. To correct the January sales of cold drinks for seasonality, the actual sales should be
reduced by 37.5%
reduced by 40%
reduced by 62.5%
increased by 60%
increased by 62.5%
The seasonal index for Wednesday is 0.84. This tells us that, on average, the number of meals served on a Wednesday is
16% less than daily average
84% less than the daily average
the same as the daily average
16% than the daily average
84% more than the daily average
Last Tuesday, 108 meals were served in the restaurant. The deseasonalised number of meals served last Tuesday was closest to
93
100
110
131
152
The seasonal index for Saturday is closest to
1.22
1.31
1.38
1.45
1.49
The seasonal index for December is
0.89
0.97
1.02
1.23
1.29
In May the store sold $213956 worth of sporting equipment. The deseasonalised value for these sales was closest to
$165 857
$190 420
$209 677
$ 218 322
$240 400
