Question 211177This question is from textbook
: It is the last week of class and I think I am finally totally brain dead. I have stared blankly at this problem for over an hour, feably making an attempt to solve it to no avail despite the fact that I have solved two others. Please help me with this problem. I can't seem to find anything about it on your website (not, dashes are column data dividers, not negatives or subtraction). Thank you!!!!!
(a) Plot the data on U.S. general aviation shipments.
(b) Describe the pattern and discuss possible causes.
(c) Would a fitted trend be helpful? Explain.
(d) Make a similar graph for 1992–2003 only. Would a fitted trend be helpful in making a prediction for 2004? (e) Fit a trend model of your choice to the 1992–2003 data.
(f) Make a forecast for 2004, using either the fitted trend model or a judgment forecast. Why is it best to ignore earlier years in this data set?
U.S. Manufactured General Aviation Shipments, 1966–2003
Year -Planes -Year -Planes -Year -Planes -Year -Planes
1966 -15,587 -1976 -5,451 -1986 -1,495 -1996 -1,053
1967 -13,484 -1977 -16,904 -1987 -1,085 -1997 -1,482
1968 -13,556 -1978 -17,811 -1988 -1,143 -1998 -2,115
1969 -12,407 -1979 -17,048 -1989 -1,535 -1999 -2,421
1970 -7,277 -1980 -11,877 -1990 -1,134 -2000 -2,714
1971 -7,346 -1981 -9,457 -1991 -1,021 -2001 -2,538
1972 -9,774 -1982 -4,266 -1992 -856 -2002 -2,169
1973 -13,646 -1983 -2,691 -1993 -870 -2003 -2,090
1974 -14,166 -1984 -2,431 -1994 -881
1975 -14,056 -1985 -2,029 -1995 -1,028
This question is from textbook
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Construct a dot-plot so you can see the downs and the
ups in number of planes ordered.
Let 1966 be represented by zero and 2003 be represented
by 37.
Find a regression line or curve and describe it.
Construct another dot plot for 1992-2003.
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Use some means or modes or whatever other statistics
you can to analyze the data.
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Cheers,
Stan H.
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