In the 1950s, George Miller estimated the number of items that could be stored in short-term memory to be the magic number __________.
A. five, plus or minus four
B. seven, plus or minus two
C. nine, plus or minus three
D. 11, plus or minus one
Answer: B
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A random sample of n = 16 scores is obtained from a normal population with ยต = 40 and ? = 8 . What is the probability that the sample mean will be within 2 points of the population mean?
a. 0.3830 c. 0.8664 b. 0.6826 d. 0.9544
Which of the following contains the highest concentration of caffeine?
a. brewed coffee b. brewed tea c. coca-cola d. Red Bull
"My roommate's IQ is 95.". The scale of measurement involved in this statement is
a. nominal. c. interval. b. ordinal. d. ratio.
Children who have the most advanced and realistic understanding of death are those who ______.
A. watch violent television shows B. have personal experience with it C. play death-related video games D. have heard about it from their peers