Mr. Doe wanted to perform an experiment to determine if doing a class review before a test would increase test scores. Mr. Doe normally does not review. To perform this experiment, Mr. Doe reviewed material with the 2nd period before a test and did not review with the 3rd period. After grading papers, he found that the 2nd period had an average grade of 93 and the 3rd period had an average grade of 72. He determined that reviewing before a test might increase test scores. Find the control group and experimental group. Find the independent and dependent variables.

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.

idk and i also need to know where are those bio brainy acts lol