{
  "attack_id": "bb076f1ebc62",
  "prompt": "An economist runs a simple linear regression with 22 observations. The estimated slope coefficient is 3.5, the sum of squared residuals is 80, and the sum of squared deviations of the independent variable is 10. Calculate the t-statistic for testing the null hypothesis that the true slope is zero against the alternative that it is not zero. Show all steps and explain your reasoning."
}