Question 1 O'Df'i point {graded} This is the formula for the average treatment effect: Let and What do A and B represent? What is A? O The outcome tor the average individual in the control group O The sample mean tor the control group O A vector of outcomes for the treatment group O The sample mean tor the treatment group What is B? O A vector of outcomes for the treatment group O The sample mean tor the control group O The outcome for the average individual in the treatment group O The sample mean for the treatment group Question 2 'I point possible (graded) The variance of the average treatment effect is given by SE 32 VP?) = F: Na + 3} What does the term #1 represent? 3 O The average of the variance of Y; in the treatment group and in the control group O The variance oi the mean of the outcomes 1'; in the treatment group O The average outcomesYi in the treatment group O The standard deviation of the outcomes Y,- in the treatment group Smeit You have used 0 of 2 attempts Save Question 3 (LONG point tgraded} When is the covariance term 32: equal to zero? 0 When treatment is randomly assigned Smelt You have used 0 of 1 attempt 53"9