Unemployed
the Data Below Are for the Number of Unemployed

Unemployed
The data below are for the number of unemployed persons (in millions)and the federal unemployment insurance payments (in billions of dollars)for the years 1978 - 1985.Some economists state that these two variables are positively related.
$\begin{array}{|l|l|l|l|l|l|l|l|l}\hline \text { Year } & \mathbf{1 9 7 8} & \mathbf{1 9 7 9} & \mathbf{1 9 8 0} & \mathbf{1 9 8 1} & \mathbf{1 9 8 2} & \mathbf{1 9 8 3} & \mathbf{1 9 8 4} & \mathbf{1 9 8 5} \\\hline \text { Federal Unemployment Insurance Payments } & 11.8 & 10.7 & 18.0 & 19.7 & 23.7 & 31.5 & 18.4 & 16.8 \\\hline \text { Number of Unemployed Persons } & 6.2 & 6.1 & 7.6 & 8.3 & 10.7 & 10.7 & 8.5 & 8.3\end{array}$

-A 95% confidence interval for the slope of the population regression line is (2.168,4.897)Explain how to use the confidence interval to test the hypothesis that the population slope is zero using a 0.05 level of significance.