The more that numbers in a set of numbers differ from each other, the larger the
a. mean
b. variance
c. correlation
d. median
e. central tendency
b. variance
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Although in-vitro fertilization is successful approximately 75% of the time, it is very expensive and is rarely covered by health insurance
a. True b. False Indicate whether the statement is true or false
A researcher takes a sample from a population and computes a statistic for the sample. Which of the following statements is correct?
a. If the sample statistic overestimates the corresponding population parameter, then the statistic is biased. b. If the sample statistic underestimates the corresponding population parameter, then the statistic is biased. c. If the sample statistic is equal to the corresponding population parameter, then the statistic is unbiased. d. None of the other statements is correct.
Which one of the following test required test takers to follow directions and perform a series of ballet movements that were confusing and distracting?
a. Wechsler Intelligence Test b. Alpha and Beta tests c. Stanford-Binet test d. Army's assessment center
It seems from the work on confirmation bias that
(a) people often find it easier to deal with negative evidence than positive evidence (b) people often find it easier to deal with positive evidence than negative evidence (c) positive evidence and negative evidence are about equally easy to deal with (d) the heuristic underlying the various sources of confirmation bias is representativeness (e) the heuristic underlying the various sources of confirmation bias is availability