Question: Consider the data set of the times taken for programming changes given in DS 12.2.5. (a) What is the standard error of 1? (b) Construct

Consider the data set of the times taken for programming changes given in DS 12.2.5.
(a) What is the standard error of β1?
(b) Construct a two-sided 95% confidence interval for the slope parameter β1.
(c) Why is the null hypothesis H0: β1 - 1 of particular interest? Test this null hypothesis. Interpret your answers.

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