A researcher records the change in weight (gained or lost) during the first semester of college for each individual in a group of 25 freshmen, then calculates the average change in weight. The average is an example of a _______

Jonah is an adverb visitor to various social networking sites. Both Jonah and his parents have noticed that all of his grades have dropped a letter grade or more. Jonah signs a contract with his parents to reduce his social networking time so that he spends more time studying and socializing with his family. According to the text, which of the following should not be placed in the contract?

A) limits on the amount of time spent online B) turning off his mobile phone when he is at home in the evening C) logging his time on the phone and computer to make sure he's meeting his time limits D) being denied all access to the phone and computer for an entire semester or until his grades improve

Which of the following is one reason why living in poverty is stressful?

a) lack of meaningfulness of work. b) too many hours of unpleasant shift work c) increased rates of disabilities due to poor prenatal care d) difficulty assimilating to the majority culture's ways