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stat question
I have a problem in stats.
The question is telling me that fred and suzie are trying to find information on air travel in the us between 19901998. The dates were recorded as years since 1990. The year 1990 was recorded as year 0.
(graph of residuals)
Predictor Coef stdev tratio P
Constant 2939.93 20.55 143.09 0.0000
years 233.517 4.316 54.11 0.0000
s=33.43
1. Is a line appropriate model to use for these data? What tells you this?
2.) What is the value of the slope of the least squares regression line? Interpret the slope in the context of this situation.
3.) what is the value of the intercept of the least squares regression line? Interpret the intercept in the context of this situation.
4.) What is the predicted number of commercial aircraft flying in 1992?
5.) What was the actual number of commercial aircraft flying in 1992?
The residual plot they give looks like the one i attached. I am clueless here. Please help!
thanks.