Study the sketch of a wagon train crossing the
Platte River, then answer the question.
What challenges does this sketch depict?
Check all that apply.
the threat of disease
o
the threat of drowning
the unpredictability of animals
attacks by American Indians
environmental challenges
DONE

Psychologists studying infant memory want to determine at what age babies can remember specific events. an experimenter uses several puppets to demonstrate a series of actions while the infant watches. after a delay, the experimenter records how many of the actions the child imitates when playing with the puppets. what is the dependent variable?

Which act was a response to three high-profile assassinations? a. the mailing of firearms act b. the national firearms act c. the gun control act d. the brady handgun violence prevention act

Match the item to the definition: indirect correlation, correlational research, correlational research, covary, pearson correlation coefficient, pearson correlation coefficient, direct correlation a. used to describe the relationship between two or more naturally occurring variables b. determines whether scores on the two variables covary c. whether two variables vary or change together d. denoted by the symbol "r" e. provides information about the sign (direction) and magnitude(strength) of the linear relationship. f. when the correlation is positiveg. when the correlation is negative