{"kind":"user","text":"Please train a boosted tree model to predict the conditional average treatment effect (CATE) of sending email-1 (em1) on the conversion rate, using demographic and financial attributes of the customers. What is the predicted increase in the probability that customer 6958 will purchase the investment product, if they are sent email-1, according to the CATE estimate provided by the model? Please provide the answer as a percentage, rounded to two decimal places."}