Advanced Statistics Exam Question
Bank. Newest 2026-2027. Questions
and Correct Answers. Graded A
A distribution of sampling error that is almost normal in shape. - ANSt
A high correlation between two predictor variables in a regression equation.
- ANSCollinearity
A numerical value based on data from a sample that indicates something
about a population. - ANSInferential statistic
A numerical value based on data from a sample that indicates something
about the sample. - ANSDescriptive statistic
A numerical value based on data from all the cases in a population that
describes something about the population. - ANSParameter
A parameter estimate in multiple regression that is a correlation. -
ANSPartial correlation
A person's average score on a test if he or she were assessed an infinite
number of times. - ANSTrue score
1
,A regression parameter estimate for which a value of .8 could indicate a
SMALLER effect than a value of .2 - ANSUnstandardized beta
A regression parameter estimate that can be interpreted as having a scale
that is similarto a correlation (but not identical with a correlation). -
ANSStandardized beta
A statistic that indicates how much additional variance is explained when
one set of predictors is added to another set. - ANSDelta R^2
A type of research that involves manipulation and random assignment. -
ANSExperimental research
A type of research that involves observing that which occurs naturally
without manipulation. - ANSCorrelational research
A word that means: "if the null hypothesis is true, then the results from the
sample are extremely unusual." - ANSSignificant
All of the cases in which a researcher is interested. - ANSPopulation
An effect size that is typically used when one variable is dichotomous. -
ANSd
An effect size that is typically used with two numerically scaled variables. -
ANSr
2
, Assume that both X and Y are transformed into z-scores:
If the correlation between X and Y is .5, what is the covariance? - ANS.5
Assume that the variance of X is 18 and the variance of Y is 18:
If the correlation between X and Y is .5, what is the covariance? - ANS9
Assume that the variance of X is 18 and the variance of Y is 18:
If the correlation between X and Y is 0, what is the covariance? - ANS0
Assume that the variance of X is 18 and the variance of Y is 18:
If the correlation between X and Y is 1, what is the covariance? - ANS18
Bruno computed a standard deviation, but he accidentally used "n" rather
than the degrees of freedom in his formula. This means that the value he
obtains will be ____________________ . - ANSBias
How do you calculate 95% confidence intervals? - ANSBandwidth = (critical
value)(standard error)
95% CI = statistic +/- bandwidth
How do you calculate the standard error of correlation? - ANSSdr = sqrt (1-
r^2/n-2)
3
Bank. Newest 2026-2027. Questions
and Correct Answers. Graded A
A distribution of sampling error that is almost normal in shape. - ANSt
A high correlation between two predictor variables in a regression equation.
- ANSCollinearity
A numerical value based on data from a sample that indicates something
about a population. - ANSInferential statistic
A numerical value based on data from a sample that indicates something
about the sample. - ANSDescriptive statistic
A numerical value based on data from all the cases in a population that
describes something about the population. - ANSParameter
A parameter estimate in multiple regression that is a correlation. -
ANSPartial correlation
A person's average score on a test if he or she were assessed an infinite
number of times. - ANSTrue score
1
,A regression parameter estimate for which a value of .8 could indicate a
SMALLER effect than a value of .2 - ANSUnstandardized beta
A regression parameter estimate that can be interpreted as having a scale
that is similarto a correlation (but not identical with a correlation). -
ANSStandardized beta
A statistic that indicates how much additional variance is explained when
one set of predictors is added to another set. - ANSDelta R^2
A type of research that involves manipulation and random assignment. -
ANSExperimental research
A type of research that involves observing that which occurs naturally
without manipulation. - ANSCorrelational research
A word that means: "if the null hypothesis is true, then the results from the
sample are extremely unusual." - ANSSignificant
All of the cases in which a researcher is interested. - ANSPopulation
An effect size that is typically used when one variable is dichotomous. -
ANSd
An effect size that is typically used with two numerically scaled variables. -
ANSr
2
, Assume that both X and Y are transformed into z-scores:
If the correlation between X and Y is .5, what is the covariance? - ANS.5
Assume that the variance of X is 18 and the variance of Y is 18:
If the correlation between X and Y is .5, what is the covariance? - ANS9
Assume that the variance of X is 18 and the variance of Y is 18:
If the correlation between X and Y is 0, what is the covariance? - ANS0
Assume that the variance of X is 18 and the variance of Y is 18:
If the correlation between X and Y is 1, what is the covariance? - ANS18
Bruno computed a standard deviation, but he accidentally used "n" rather
than the degrees of freedom in his formula. This means that the value he
obtains will be ____________________ . - ANSBias
How do you calculate 95% confidence intervals? - ANSBandwidth = (critical
value)(standard error)
95% CI = statistic +/- bandwidth
How do you calculate the standard error of correlation? - ANSSdr = sqrt (1-
r^2/n-2)
3
