The blood-brain barrier is a __________
A) filter that keeps dangerous substances out of the brain
B) mechanism for cells to stay negatively charged while at rest
C) mechanism for the brain to easily exchange substances through the blood vessels in the brain
D) way for the brain to get the excess oxygen it needs to the brain
Answer: A
Psychology
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School-based antibullying programs have been found to reduce rates of bullying by:
A) 10% to 25%. B) 25% to 50%. C) 50% to 75%. D) 75% to 100%.
Psychology
Which of the following is not an assumption of the t test? a. The data should be ordinal or nominal
b. The population distribution of scores should be symmetrical. c. The population mean (m) is known, but the population standard deviation (s) is not known. d. The sample size is typically less than 30.
Psychology