Statistics Quiz # 20

In analysis of variance, when a factor or an independent variable has a significant effect upon the outcome variable is called

Main effect

Interaction effect

Linear effect

None of these

The outcome where the effect of one factor is differentiated across another factor is called

Main effect

Interaction effect

Linear effect

None of these

The predicted ____ value in a regression equation.

X

Y

Z

A

The predicted Y value in a ____ equation.

Regression

Quadratec

Linear

Nonlinear

The equation that defines the points and the line that are closest to the observed scores is called

Regression equation

Quadratec equation

Linear equation

Nonlinear equation

The line drawn based on values in a regression equation is called

Bioline

Trend line

Single line

All of these

Line of best fit regression line that best fits the observed scores and minimizes the error in prediction.

True

False

The difference between the observed score (Y) and the predicted score (Y′) is error in prediction.

True

False

Criterion is _____variable

Dependent

Independent

Constant

All of these

Predictor is _____ variable.

Dependent

Independent

Constant

All of these

____ line is trend line

Regression

Quadratec

Linear

Nonlinear

Standard error of estimate is measure of accuracy in prediction that reflects variability about the regression line.

True

False

A statistical technique whereby several variables are used to predict one is called

Single regression

Triple regression

Multiple regression

All of these

Statistics used for the inference from a sample to a population that assume the variances of each group are similar is called

Parametric

Nonparametric

Metametric

Trimetric

Distribution-free statistics that do not require the same assumptions as do parametric statistics is called

Parametric

Nonparametric

Metametric

Trimetric

In which test the goodness of fit test is on one dimension, which examines whether the distribution of frequencies is different from what one would expect by chance.

Chi square test

Bi square test

Square test

Mid square test

A chi-square test of two dimensions or more that examines whether the distribution of frequencies on a variable is _____ of other variables.

Dependent

Independent

Both a and b

None

1,152,921,504,606,846,976 bytes of data—lots and lots of data, and the amount of data in the world grew just as you read this is exabytes.

True

False

Examining large data sets for patterns is _____mining

Table

Data

Observe

None of these

A table that shows frequencies by two or more variables. The levels of one variable become column labels, and the levels of the other variable become row labels is called

Periodic table

Pivot table

Cross tabulation table

All of these

In which table that allows the user to easily manipulate the rows, columns, and frequencies included in cross-tabulation tables is.?

Periodic table

Pivot table

Cross tabulation table

All of these

An individual at the 50th percentile would have a z score of ______.

Zero

+1

1

Cannot be determined

One advantage of using repeated-measures designs rather than standard between-subjects designs is that ______.

The error SS is often smaller in repeated-measures thereby increasing power

Because outcome variables are correlated in repeated measures, the explained SS is higher

Repeated measures usually have lower risk of Type I error

Repeated measures do not have to meet all of the assumptions given for between subjects designs

When are descriptive measures most often used?

To describe how often something occurs

To determine if a sample is representative of a population

To predict an outcome

To determine the effect of an intervention

The value that results from the application of a statistical test is called

Obtained value

Constant value

Variable value

All of these

Independent variable is also known as_____

Treatment variable

Predictor variable

Response variable

Both a and b

As the degrees of freedom increase, the t distribution approaches the _____ distribution.

Uniform

Normal

Exponential

P

As the margin of error decreases, the width of the confidence interval _______________.

Number of degrees of freedom

Narrower for 90 percent confidence than 95 percent confidence

The sample size is large

Decreases

A ______ shows two variables combined as individual points on a graph.

Positive correlation

A positive correlation between amount of sunlight and plant growth.

A positive correlation between studying and grades

Negative correlation

The t distribution approaches the _______________ distribution as the sample size ___________.

Binomial, increases

Binomial, decreases

Z, increases

Z, decreases