Examining Relationships among Statistics and Applications MCQ
The straight line that best fits a correla-tion and consists of each X value in the relationship and its predicted Y value is line of best fit
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Correct Answer:
True
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After the first quiz to assess student knowledge of the reading material, a professor reports that student scores ranged from 0 to 2 on the 10-point quiz. If the students really read the material, what could explain the scores?
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Correct Answer:
Floor effect
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By substituting an X value in the regression equation, we compute the ______.
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Predicted Y (Y′) value that falls on the line of best fit
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Correlational studies are used ______.
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Correct Answer:
All of these
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The scatterplot above depicts a ______.
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Correct Answer:
Negative relationship
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The standard error of the estimate represents the ______.
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Correct Answer:
Average difference between the predicted Y values (Y′) and their actual values
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The regression equation is the formula ______.
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Correct Answer:
For the line of best fit
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You are studying the relationship between pet ownership (yes–no) and life satisfaction. You should compute a ______.
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The statistic used to assess relationships between two interval/ratio variables is a ______.
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Correct Answer:
Pearson’s correlation coefficient
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When two variables move in the same direction together (both increase or both decrease), they will be ______.
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Correct Answer:
Positively correlated
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After the first test, your professor found a correlation of r = –.23 between students’ self-reported anxiety and test scores. This means that ______.
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Correct Answer:
There is a weak negative relationship between anxiety and test scores
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The value that results from entering a particular X value in a regression equation is ___ predicted
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Correct Answer:
Y
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The point at which a line of best fit crosses the y-axis, designated as “___” in the regression equation is Y intercept
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Correct Answer:
A
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Standard error of the estimate is formula for a ___ regression equation.
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Correct Answer:
Linear
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Describes the rate of change in Y with each unit of change in X (or the incline of the line of best fit), desig-nated by “___” in the regression equation is called slope
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Correct Answer:
B
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A graph of the data points created by participant scores on two measures is called
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Scatterplot
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Equation that describes the rela-tionship between ___variables and allows us to predict Y from X.
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Correct Answer:
Two
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The variable that is used to predict the value of another variable, and a term used instead of IV in a correlational design.
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Correct Answer:
Predictor
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A relationship where scores on two variables move in the same direction is called
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Correct Answer:
Positive correlation
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Point biserial correlation coefficient describes the relationship between a dichotomous variable and an interval/ratio variable; interpreted similarly to a Pearson correlation coefficient.
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Correct Answer:
True
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Perasons's r coefficient in statistics used to describe a linear rela-tionship between ___interval/ratio measures describes the direction (positive or negative) and strength (between +/− 1.0) of the relationship.
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Correct Answer:
Two
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A relationship where scores on two variables move in opposite directions (one increases while the other decreases).
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Negative correlation
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____ regression is a statistical technique that computes both the individual and combined contribu-tion of two or more variables to the prediction of another variable.
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Correct Answer:
Multiple
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A relationship between two variables, defined by their moving in a single direction together is ____ relationship
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Linear
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Restricting the lower limit of a measure so that lower scores are not assessed accurately is called
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Floor effect
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Dichotomous variable is a nominal variable that has ___ levels or groups.
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Correct Answer:
Two
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Criterion variable is predicted variable in a regression equation.
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Correct Answer:
True
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A correlational research design investigates relationships between variables without the researcher controlling or manipulating any of them
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Correct Answer:
True
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A relationship between variables is called
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Correct Answer:
Correlation
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Coefficient of determination is proportion of vari-ability accounted for by knowing the relationship (correla-tion) between ___ variables.
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Correct Answer:
Two
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Restricting the upper limit of a measure so that higher levels of a measure are not assessed accurately is called
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Correct Answer:
Ceiling effect
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