Is there an association between someone eating large quantities of chocolate and being overweight? A random sample of $26$ women had their body fat percentage measured and were asked how much chocolate they eat a day. A computer regression analysis of the data is given below:
Dependent variable is: Body fat
$R^2 = 20.26\%$
$s= 7.89 $
Assuming the conditions have been satisfied and using $95\%$ confidence, which of the following represents the margin of error for the slope $t$-interval?