2. What are the two things Christakis discovered about how social networks work? 3. What is a cluster? What conclusions did Christakis come to using clusters regarding obesity? 4. What are the reasons behind this clustering of obesity?

Why are committees necessary in congress?

When recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous years?

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design