Math Art
In experimental terminology, IV stands for _____ and DV stands for _____.
independent variable; dependent variable
When you see the letter p in relation to a test of significance, it means:
Probability
Type 1 error is when the researcher _____ the null hypothesis when it is ______.
rejects; true
The most useful measure of central tendency is the:
Mean
What category of sampling is ideal but not always feasible?
The variable you manipulate/control in an experiment is the:
IV or independent variable
In the social sciences the accepted probability level is usually:
.05 or less
Type 2 error is when the researcher _______ the null hypothesis when it is _____.
accepts; false
What measure of central tendency is paired with standard deviation?
Mean
What type of sampling relies on participants to identify additional potential research participants?
Snowball sampling
What type of rating scale uses these responses: strongly agree, somewhat agree, neutral, somewhat disagree, or strongly agree
Likert Scale
A counselor believes that clients who receive assertiveness training will ask more questions in counseling classes. An experimental group receives assertiveness training while a control group does not. In order to test for significant difference between the groups the counselor should utilize:
t-test
The researcher notes that a group of clients who are not receiving counseling, but are observed in a research study are improving. Her hypothesis is that the attention she has given them as been curative. The best explanation of their improvement could be explained by what kind of effect?
The Hawthorne Effect
In a basic curve, or so-called frequency polygon, the point of maximum concentration is the:
Mode
Probability sampling, stratification and clustering techniques, and increasing sample size minimize what?
In a new study, the participants do not know whether they are receiving an experimental treatment for depression or whether they are simply part of the group. This is known to the researcher. What kind of study is this?
Single-blind study
What does Pearson's r measure?
correlation
During the recruitment of participants, by random chance, the researcher recruits more females than males. What is this error called?
sampling error
What is a single bar of a histogram called?
Bin
What is the special type of sampling bias in which some participants drop out in the middle of an experiment?
Mortality
A researcher wants to conduct a new study, but the size of the target population is elusively difficult to define. What category of sampling could be used to recruit participants?
Non-probability sampling
This type of statistical analysis helps remove confounding, extraneous variables
Analysis of covariance (ANCOVA)
What is the name for the magnitude of sampling error?
Precision
What measure of central tendency is paired with interquartile range?
Median
What is the sampling technique that relies on specifically defined layers within a sample that correspond to the target population's characteristics?
Stratified random sampling