An experimenter is interested in the influence of taking a one semester long test preparation course on performance on the SAT. She contacts high school students who have and who have not taken the course and compares their scores on the SAT exam. She finds that the students who have taken the course score signifigantally higher on the test. The appropriate statistical test is
a. descriptive statistics
b. pearson correlation
c. chi-square
d. t-test
d. t-test
You might also like to view...
A social problem that has been around for any significant period of time often provides some benefit to some portion of the population even as it imposes hardships on other portions
a. true b. false
Answer the following statements true (T) or false (F)
1. Random assignment is what differentiates true experiments from quasi, natural and pre-experimental design. 2. Randomization cannot be used to control for confounds. 3. Researchers should be able to know all possible confounds before conducting an experiment. 4. True randomization means at least one side – either the researcher or the subject – has control over the groups. 5. A “blind” subject in an experiment does not know the group they were assigned to nor the reason why they were assigned to that group.
On average, Americans are exposed to approximately 50,000 minutes of commercials each year
Indicate whether the statement is true or false
The Harlow experiments to discover the effects of social isolation on rhesus monkeys showed that _______
a. monkeys isolated for six months were highly fearful when they were returned to others of their kind. b. isolated monkeys able to cuddle artificial mothers developed normally. c. even several days of social isolation permanently damaged infant monkeys. d. prolonged isolation had little effect on infant monkeys.