The table below shows a balance table from a randomized controlled trial about how school meals impact test scores. Schools were randomly assigned to either a treatment group that received free school meals or a control group that did not. Columns (1) and (2) report the group averages for the treatment and control schools while column (3) reports the difference between the two groups. The standard error of the difference is given in parentheses below the difference.

Treatment (1) Control (2) Difference (1) - (2)

Student math test scores 67 70 3

(1.2)

Student English test scores 76 85 9

(6.4)

Percent female students 52 54 2

(0.5)

Class size 14 13 1

(0.2)

Family income of students $115,000 $100,000 $15,000

(5000)

1) The difference between the treatment and control group is statistically significant at the 5% level of significance for which of the following variables (characteristics)?(Select all that apply)

a) Student math test scores

b) Student english test scores

c) Percent female students

d) Class size

e) Family income of students

2) Based on the table above, is our assumption that the outcomes of the treatment group would have been the same as the control group if not for the treatment, likely to hold?

Yes or No