A customer comment phone line is staffed from 8:00
a.Use this information to calculate a seasonal index.
a.m.to 4:30 p.m.five days a week.Records are available that show the number of calls received every day for the last five weeks.

\begin{array} { c c c | c c c } \text { Week } & \text { Day } & \text { Number } & \text { Week } & \text { Day } & \text { Number } \\\hline 1 & \mathrm { M } & 28 & 4 & \mathrm { M } & 35 \\& \mathrm {~T} & 12 & & \mathrm {~T} & 17 \\& \mathrm {~W} & 16 & & \text { W } & 16 \\& \mathrm { TH } & 15 & & \text { TH } & 20 \\& \mathrm {~F} & 23 & & \mathrm {~F} & 29 \\2 & \mathrm { M } & 29 & 5 & \mathrm { M } & 37 \\& \mathrm {~T} & 10 & & \mathrm {~T} & 19 \\& \mathrm {~W} & 14 & & \text { W } & 18 \\& \mathrm { TH } & 14 & & \mathrm { TH } & 21 \\& \mathrm {~F} & 26 & & \mathrm {~F} & 28 \\3 & \mathrm { M } & 32 & & & \\& \mathrm {~T} & 15 & & &\\&W&15\\&TH&18\\&F&27\end{array}

b.Deseasonalize the data.
c.Find the trend line.
d.Assume there is no cyclical component and forecast the calls for week 6.

Time Series Methods

Multiple Choice

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