Question: In a simple linear regression analysis of a dependent variable Y on an independent variable X, based on 18 observations, the 95% confidence interval for

In a simple linear regression analysis of a dependent variable Y on an independent variable X, based on 18 observations, the 95% confidence interval for

(i.e. the slope) was (1.8, 2.2).

What is the value of the t-test statistic for testing the null hypothesis that

= 0.

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