When watching an electric train, Amy will look ahead to the end of the tunnel,

rather than staring at the spot where the train disappeared. Amy must be at least years old.
a. two
b. three
c. four
d. five

ANSWER: a

Psychology

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Indicate whether this statement is true or false.

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. Which of these is a measure of central tendency?

a) mean b) scatterplot c) standard deviation d) correlation coefficient

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