SX285 Exam #2 Review

This type of randomization accounts for factors that could influence findings.

This type of distribution is bell-shaped and symmetrical around the center.

When experimenter AND subjects do not know which treatment the subjects received until after experiment is completed​.

This type of statistics make generalizations about the data as well as predictions.

Any estimate of a population parameter based on sample statistics contains some error.

Randomization helps to minimize:

When Pearson's r is calculated to be closer to 0, there is a ___ relationship between the variables.

_____ is the ability of a test to detect an effect if the effect is present.​

_____ is a characteristic of the entire population​.

A study variable indirectly influenced by the independent variable​.

_____ represents the best linear estimate of the relationship between the two variables​

Good experimental design:

This determines if a test covers all relevant subtopics or components equally.

Using NHST, both hypotheses can be true.

Correlation analysis cannot be used for NHST.

____ is a clear statement as to the expected outcome of a phenomenon.

Which is NOT an example of a variable?

In an experiment, the control group may:

A ____ compares the effects of an independent variable on multiple dependent variables.

These are guidelines that restrict subject participation in a study.

____ is rejecting the null hypothesis when it is actually true.

In research, it is generally accepted that power should be ___ or higher

When subjects experience a benefit despite NOT receiving a true treatment​.

____ is probability of getting our data if the null hypothesis were true.

____ is an index of the magnitude of relationship between an IV and DV​.

Statistics allows us to make a statement and then cite the odds that it is correct​.

This numerical value is an estimate of the spread of scores away from the mean.

When study subjects are assigned to one group or another based on chance alone

The score that occurs most frequently in a distribution is called:

Variables that are not controlled or accounted for in research design​.

As sample size increases, so does the ______ our test​

A distribution is _______ when scores bunched at low values.

A ____ p-value indicates strong evidence against the null hypothesis​.

___ is the relationship between what is being measured and the number that represent what is being measured.

When each subject serves as their own control.

This type of t test is used when subjects do not serve as their own control.

____ is reduction in subjects able to complete an entire research study​

What is variance?

____ is the extent to which the observed changes in the DV can be attributed ONLY to changes in the IV​

Which of the following states there is no relationship between IV and DV​.

Anything in an experiment that distorts findings in a systematic way​ is called:

Hair color is an example of what kind of variable?

A type of research design with a single DV.

A dummy treatment that does not affect the dependent variable(s) is called:

Generally, ___ of values are within 2 SD of the mean.

Which is NOT a measure of central tendency?

What is the alpha level typically set at in a research study?

It's poor scientific practice to select dependent variables post-intervention or until an outcome is reached.

Selection of the dependent variable should be based on what the independent variable is most likely to influence.

____ are variables that are measured in the experiment.