Monitoring the yield of a particular chemical reaction at various reaction vessel temperatures produces the results shown in the following table.
Temp. (?C)
Yield (%)
150
77.4
250
88.9
76.7
89.2
78.2
89.7
200
84.1
300
94.8
84.5
94.7
83.7
95.9
a. Find the least-squares estimates for β0, β1, and σ2 for the simple linear model Yield = β0 + β1 Temp +ε.
b. Can you conclude that β0 is not equal to 0?
c. Can you conclude that β1
is not equal to 0?
d. Make a residual plot. Does the linear model seem appropriate?
e. Find a 95% confidence interval for the slope.
f. Find a 95% confidence interval for the mean yield at a temperature of 225?C.
g. Find a 95% prediction interval for a yield at a temperature of 225?C.
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