Statistics Quiz # 19

A statement of equality between sets of variables is called

Directional

Nondirectional

Research

Null

A statement of inequality between two variables is called

Directional

Nondirectional

Research

Null

A research hypothesis that posits a difference between groups but not in either direction is known as

Directional

Nondirectional

Research

Null

A research hypothesis that posits a difference between groups in one direction is called

Directional

Nondirectional

Research

Null

A ____test, reflecting a directional hypothesis is one tailed test

Non directional

Directional

Constant

Variation

A ____ test, reflecting a nondirectional hypothesis is two tailed test

Non directional

Directional

Constant

Variation

Which type of shaped curve is normal curve?

Line shaped

Bell shaped

Cone shaped

All of these

A distribution of ____ that is symmetrical about the mean, the median, and the mode and has asymptotic tails is bell shaped curve.

Variables

Scores

Curve

None

The quality of the normal curve such that the tails never touch the horizontal axis is called

Symptotic

Asymptotic

Skewness

None

A raw score that is adjusted for the mean and standard deviation of the distribution from which the raw score comes is called

Z score

Y score

X score

Score

Z score is standard scores

True

False

The quality of a distribution that defines the disproportionate frequency of certain scores is called

Kurtosis

Skewness

Asymptotic

All of these

The quality of a distribution that defines how flat or peaked it is called

Kurtosis

Skewness

Asymptotic

All of these

The quality of a normal curve that is relatively ____ compared with a normal distribution.

Flat

Peaked

Random

Curved

The quality of a normal curve that is relatively ____ compared with a normal distribution.

Flat

Peaked

Random

Curved

The risk set by the researcher for rejecting a null hypothesis when it is true is called

Significance level

Statistical level

Correlation level

All of these

Statistical significance is also called significance level.

True

False

The probability of ____a null hypothesis when it is true.

Accepting

Rejecting

Modifying

None

The probability of ____ a null hypothesis when it is false.

Accepting

Rejecting

Modifying

None

Obtained value is statistical value

True

False

In which mean is used to compare a sample mean in one sample z test?

Individual

Population

People

All of these

Effect size is measure of the magnitude of difference between ____ groups, usually calculated as Cohen’s d

One

Two

Three

None

Degrees of freedom is value which is different for different _____ tests, that approximates the sample size of number of individual cells in an experimental design.

Statistics

Physical

Chemical

Maths

Factorial analysis of variance tests the means of more than one ____variable.

Dependent

Constant

Independent

All of these

Analysis of variance (or ANOVA) has only ____ independent variable

One

Two

Three

Multiple

Analysis of variance is ____ way

One

Two

Three

Multiple

A research design used to explore more than one treatment variable is called

Simple design

Factorial design

Variance design

Complicated design

An analysis of variance summary is source table that lists sources of variance

True

False

Post hoc is referring to tests done to determine the true source of a difference among three or more groups.

True

False

An analysis of ____ with more than one factor or independent variable.

Regression

Variance

Correlation

All of these