Advanced Stats - Exam 1 Questions & Answers 2023/2024
a numerical value based on data from a *sample* that indicates something about a *population* - ANSWER-inferential statistic
the term used when the expected value is not equal to the parameter - ANSWER-bias
a numerical value based on ...
a numerical value based on data from a *sample* that indicates something about a *population* -
ANSWER-inferential statistic
the term used when the expected value is not equal to the parameter - ANSWER-bias
a numerical value based on data from a *sample* that indicates something about the *sample* -
ANSWER-descriptive statistic
the average of all the values for a population of values from which a single value can be randomly
sampled - ANSWER-expected value
the general term for a numerical value based on data from a sample (that may indicate something about
the sample or something about the population) - ANSWER-statistic
the set of cases from which a researcher collects data - ANSWER-sample
a numerical value based on data from *all the cases in a population* that describes something about the
population - ANSWER-parameter
all of the cases in which a researcher is interested - ANSWER-population
the extent to which a measured value stays the same regardless of how, when, or where it is measured -
ANSWER-reliability
the extent to which a scale measures what it is supposed to measure - ANSWER-validity
, a type of research that involves observing that which occurs naturally without manipulation - ANSWER-
correlational research
a type of research that involves manipulation and random assignment - ANSWER-experimental research
in a normal distribution, what percent of cases fall between a score that is at the mean and a score that
is one standard deviation above the mean? - ANSWER-34%
in a normal distribution, what percent of cases fall between a score that is one standard deviation above
the mean and a score that is two standard deviations above the mean? - ANSWER-14%
in a normal distribution, what percent of cases fall above the second standard deviation? - ANSWER-2%
in the equation xi = xbar + ei, what is xi? - ANSWER-the score on x for case i
in the equation xi = xbar + ei, what value is xi(estimate) equal to? - ANSWER-xbar
in the equation xi = xbar + ei, what is ei? - ANSWER-how much case i deviates from the mean
in the equation xi = xbar + ei, , what is the mean of ei? - ANSWER-zero
in the equation xi = xbar + ei, what commonly calculated statistic is essentially the mean of (abs)ei? -
ANSWER-standard deviation
what is a limitation of correlational research? - ANSWER-cannot determine causation
what is a limitation of experimental research? - ANSWER-lower ecological validity
what are the two questions Egas Moniz could have answered if he had conducted a clinical trial? -
ANSWER-1. how big is the effect?
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