Sales in (thousands of dollars) of a new shirt designed for the current temperatures is given below
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Question:
Sales in (thousands of dollars) of a new shirt designed for the current temperatures is given below for the first three weeks (Monday to Friday) at JPK Inc. The company wants to use the partial Excel Summary Output and the Time Series data below to develop a regression equation and use seasonal indexes to estimate their sales. Note: time period (t=1, 2, 3, …)
Quarter | Sales | t | Y/ ŷ | ||
Week 1 | M | 47 | 0.958 | ||
T | 51 | 1.031 | |||
W | 45 | 0.903 | |||
T | 56 | 1.115 | |||
F | 57 | 1.127 | |||
Week 2 | M | 46 | 0.902 | ||
T | 50 | 0.974 | |||
W | 45 | 0.870 | |||
T | 59 | 1.132 | |||
F | 61 | 1.162 | |||
Week 3 | M | 48 | |||
T | 50 | ||||
W | 46 | ||||
T | 57 | ||||
F | 58 |
- Calculate the seasonal indexes to three decimal places, show your calculations. (5 marks)
- Forecast the sales on Friday of week 4. (2 marks)
Related Book For
Applied Regression Analysis and Other Multivariable Methods
ISBN: 978-1285051086
5th edition
Authors: David G. Kleinbaum, Lawrence L. Kupper, Azhar Nizam, Eli S. Rosenberg
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