The following data were collected in an experiment to
Chapter 8, Problem 15E(choose chapter or problem)
The following data were collected in an experiment to study the relationship between extrusion pressure (in KPa) and wear (in mg).
The least-squares quadratic model is \(y=-32.445714+0.43154286 x-0.000982857 x^{2}\).
a. Using this equation, compute the residuals.
b. Compute the error sum of squares SSE and the total sum of squares SST.
c. Compute the error variance estimate \(s^{2}\).
d. Compute the coefficient of determination \(R^{2}\).
e. Compute the value of the F statistic for the hypothesis \(H_{0}: \beta_{1}=\beta_{2}=0\). How many degrees of freedom does this statistic have?
f. Can the hypothesis \(H_{0}: \beta_{1}=\beta_{2}=0\) be rejected at the 5% level? Explain.
Equation Transcription:
Text Transcription:
y=-32.445714+0.43154286x-0.000982857x2
s^2
R^2
H_0:beta_1=2=0
H_0:beta_1=2=0
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