Reference no: EM131009314
Compensation
These data measure hourly compensation in the US manufacturing sector from 1987 through 2011. The data are assembled by the Bureau of Labor Statistics from surveys. The value of the index was set to 100 in 2005, so the data indicate relative amounts not dollars. The data table includes a column Quarter, with consecutive values 1, 2, c100, for modeling time trends.
(a) Fit a linear trend to summarize the pattern in these data. Would it be correct to describe the residuals as autocorrelated, or is there a better description of the pattern in the residuals?
(b) Form a dummy variable that takes on the value 1 in quarter 90 (the second quarter of 2009) and later. Add this dummy variable with its interac- tion with Quarter to the simple regression fit in part (a). Interpret the equation of the resulting multiple regression of compensation on Quarter, Dummy and Quarter * Dummy?
(c) Does the multiple regression estimated in part (b) meet the conditions of the MRM, or do problems remain?
(d) Consider a different way to model the response: its percentage rate of growth. Form the percent- age changes in the compensation index and consider the timeplot of these. Does this series appear simple or do lags and time trends offer better forecasts?
(e) Which of these models would you use to forecast this time series? Justify your choice and use it to forecast the index for the first quarter of 2012. Include an interval with your forecast.
|
Sampled digitally at sampling frequencies
: A sine wave at frequency f= 90 Hz is sampled digitally at sampling frequencies fs=200,160 and 50 Hz respectively. For each case, discuss whether there is aliasing. Also for each case, calculate the aliasing (perceived) frequency.(b) Using EXCEL (or M..
|
|
Data measure imports of goods and services
: These data measure imports of goods and services into the United States, quarterly from 1981 through 2011 1n = 124 quarters2. The data are given in billions of dollars, expressed at an annual rate. The data table includes a column named Quarter, wit..
|
|
Data measure imports of goods and services
: These data measure imports of goods and services into the United States, quarterly from 1981 through 2011 1n = 124 quarters2. The data are given in billions of dollars, expressed at an annual rate. The data table includes a column named Quarter, wit..
|
|
Calculate the carbon content at 0.5mm beneath
: Consider the gas carburizing of a gear of 1020 steel at 927oC. Calculate the carbon content at 0.5mm beneath the surface of the gear at 5hr carburizing time. Assume the carbon content at the surface is 0.90% and that the steel has a nominal carbon co..
|
|
Problem regarding the compensation
: These data measure hourly compensation in the US manufacturing sector from 1987 through 2011. The data are assembled by the Bureau of Labor Statistics from surveys. The value of the index was set to 100 in 2005, so the data indicate relative amoun..
|
|
The average annual electrical energy
: Calculate: 1) the average annual electrical energy, 2) the average electrical power, 3) the maximum number of panels that can be installed, if some minimum space has to be left for technician to walk through.
|
|
How can you avoid resistance to change
: What type of change is needed? (Example: Cost, Process, Culture.) What steps would you take to implement that change? How can you avoid resistance to change
|
|
The processes occuring in open system
: The processes occuring in open system which permit the transfer of mass to and from the system
|
|
A cycle consisting of one constant pressure
: A cycle consisting of one constant pressure, one constant volume and two isentropic processes
|