Question: Below you are given a partial Minitab output based on a sample of 25 observations. Coefficient Standard Error Constant 145.321 48.682 X 1 25.625 9.150

Below you are given a partial Minitab output based on a sample of 25 observations.

Coefficient

Standard Error

Constant

145.321

48.682

X1

25.625

9.150

X2

-5.720

3.575

X3

0.823

0.183

1. The interpretation of the coefficient on X1is that

2. We want to test whether the parameter b1is significant. The test statistic equals

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