SBS 200 - Exam 1 UPDATED ACTUAL
Questions and CORRECT Answers
What is statistics? - CORRECT ANSWER -"science of collecting, organizing, presenting,
analyzing, and interpreting data to assist in making effective decisions"
Dependent Variable - CORRECT ANSWER -The variable being measured by investigator. The data
that is being recorded.
Independent variable - CORRECT ANSWER -The factor that is being manipulated by the
experimenter.
Bivariate data has two variables - CORRECT ANSWER -t-test, ANOVA, correlation, simple
regression
Multivariate has two or more variables - CORRECT ANSWER -two-way ANOVA or multiple
regression
Operational definition - CORRECT ANSWER -Measurement versus construct
Evaluating an operational definition - CORRECT ANSWER -Validity and reliability
validity - CORRECT ANSWER -the extent to which a your assessment actually measures what it
intends to measure
Reliability - CORRECT ANSWER -the extent to which an assessment yields consistent results
Random sample - CORRECT ANSWER -Everyone in population has the same chance of being
recruited or selected to be part of sample
Random sampling is completely unrelated to whether a study is a true experiment
, Random assignment - CORRECT ANSWER -Everyone already in the study has the same chance of
being assigned to each level of the independent variable
Associated with true experiment
Quasi-experimental designs - CORRECT ANSWER -are good for prediction and describing
relationships
They do not use random assignment
Random sampling - CORRECT ANSWER -Completely unrelated to the quasi-experimental vs true
experimental distinction
Allows for creating an unbiased sample so we can make useful generalizations to the whole population
from our sample
Random sampling techniques - CORRECT ANSWER --simple random sampling
-systematic random sampling
-stratified random sampling
-cluster sampling
Nonrandom sampling techniques - CORRECT ANSWER --convenience sampling
-snowball sampling
-judgment sampling
Parameter - CORRECT ANSWER -a numerical measure that describes a characteristic of an entire
population
Usually represented by Greek letters (μ)
Statistic - CORRECT ANSWER -a single numerical fact or a value computed from a sample of
data that is used to describe the sample, estimate a population parameter, or test a hypothesis
Usually represented by Roman letters (x)
Questions and CORRECT Answers
What is statistics? - CORRECT ANSWER -"science of collecting, organizing, presenting,
analyzing, and interpreting data to assist in making effective decisions"
Dependent Variable - CORRECT ANSWER -The variable being measured by investigator. The data
that is being recorded.
Independent variable - CORRECT ANSWER -The factor that is being manipulated by the
experimenter.
Bivariate data has two variables - CORRECT ANSWER -t-test, ANOVA, correlation, simple
regression
Multivariate has two or more variables - CORRECT ANSWER -two-way ANOVA or multiple
regression
Operational definition - CORRECT ANSWER -Measurement versus construct
Evaluating an operational definition - CORRECT ANSWER -Validity and reliability
validity - CORRECT ANSWER -the extent to which a your assessment actually measures what it
intends to measure
Reliability - CORRECT ANSWER -the extent to which an assessment yields consistent results
Random sample - CORRECT ANSWER -Everyone in population has the same chance of being
recruited or selected to be part of sample
Random sampling is completely unrelated to whether a study is a true experiment
, Random assignment - CORRECT ANSWER -Everyone already in the study has the same chance of
being assigned to each level of the independent variable
Associated with true experiment
Quasi-experimental designs - CORRECT ANSWER -are good for prediction and describing
relationships
They do not use random assignment
Random sampling - CORRECT ANSWER -Completely unrelated to the quasi-experimental vs true
experimental distinction
Allows for creating an unbiased sample so we can make useful generalizations to the whole population
from our sample
Random sampling techniques - CORRECT ANSWER --simple random sampling
-systematic random sampling
-stratified random sampling
-cluster sampling
Nonrandom sampling techniques - CORRECT ANSWER --convenience sampling
-snowball sampling
-judgment sampling
Parameter - CORRECT ANSWER -a numerical measure that describes a characteristic of an entire
population
Usually represented by Greek letters (μ)
Statistic - CORRECT ANSWER -a single numerical fact or a value computed from a sample of
data that is used to describe the sample, estimate a population parameter, or test a hypothesis
Usually represented by Roman letters (x)
