Say that we ran the following regression from the Credit Card data set. Note that expenditure is the spending on the credit card, and age is the age of the cardholder. Write down the regression equation.

Interpret the coefficients. Make a note on why interpreting the constant could be non-sense.

Calculate by hand and from the regression output and interpret the results.

Conduct the following hypothesis test:

Calculate the t-stat by hand.

Interpret the results of the hypothesis test.