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1. For a certain product it was found that annual sales volume could be well described by a third order autoregressive model. The estimated model obtained was: xt = 202 + 1.10xt-1 - 0.48xt-2 + 0.17xt-3 + εt
a. For 1993, 1994, and 1995, sales were 867, 923, and 951 respectively. Calculate sales, forecasts for the years 1996 through 1998.
b. Test the overall significance of the model, given that R2 = 0.7.
2. Consider the following time series data.
Period
1.1
150
1.2
284
1.3
119
1.4
115
2.1
187
2.2
266
2.3
138
2.4
116
3.1
170
3.2
221
3.3
124
3.4
121
a. Develop a centred 4- point moving average and a seasonal index for this time series.
Differentiate the following expressions:aa. y=2x2-3x2+5x-7b. y=3/x-x2+8 c. y=4t2-16/t2+6t-1
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1. Argue for or against the principle that a just society must provide equality of opportunity for those with the interest and talent.
What are the critical characteristics of quality management? Discuss how quality management relates to safety. How do quality management and total safety management integrate to form the TSM model?
Green engineering has proven to be an obstacle to many industries. The reason is their misunderstanding of the potential benefits if properly implemented. In your opinion, would you classify green engineering as a quick fix program or a long-term ..
In your own words, describe the laws of thermodynamics. Explain how these scientific laws apply to energy use, energy conversions, and the need for energy efficiency.
q1.describe the importance of rare earth elements in science and technology. assess the most common uses of these
if calcium metal was used as an unknown in an experiment of this type, what would be a reasonable value for 'n' assuming the mass was 0.063g
Describe the effect of a nondisjunction event in the first division and one in the second in your own words.
University of Phoenix Material White Privilege and Colorism Answer these questions and include your answers when you submit your assignment. What is White privilege?
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