When the null hypothesis is rejected,
a. you are stating that there is only one population of research participants.
b. you are stating that the independent variable had no effect on the dependent variable.
c. you are stating that nothing (null) was found.
d. you are saying that your finding is statistically significant.
Question 2
In a single-case experiment that is essentially an interrupted time series, the ability to determine that the treatment has an effect
a. requires that the participant understand that his or her behavior must change.
b. requires that the experimenter must be able to predict what the behavior would have been without the treatment.
c. requires that the mean of the pretreatment session be significantly lower than the mean of the posttreatment session.
d. requires that the mean of all pretreatment sessions be significantly higher than the mean of all of the posttreatment sessions.
Living in groups and the many eyes hypothesis.
Body size and population density of herbivorous mammals
Population Interactions and Communities
An aryballe vase or decanter made for carrying body oils clearly demonstrates that ancient Greeks we
Population size, 1970 - 2050
Working-Age Fraction of the U.S. Population, 1950–2050