Which of the following structures is most similar in function to a filtering system in the engine of a car that moves gas from the gas tank, filters impurities out of it, and delivers it to the carburetor?

If increases in one variable have no consistent relationship to changes in a second variable, what is the correlation between them?

a. -1 b. 0 c. .5 d. 1

Rich's first psychology exam score is +1 standard deviation from the mean in a normal distribution. The test has a mean of 60 and a standard deviation of 6 . Rich's percentile rank would be approximately a. 70%

b. 84%. c. 66%. d. cannot determine from the information given