Stats Math225N Exam Questions And
Answers Latest 2025
Nominal Data -
correct answer ✅data of categories only. Data cannot be arranged
in an ordering scheme. (Gender, Race, Religion)
observational study -
correct answer ✅observes individuals and measures variables of
interest but does not attempt to influence the responses
experimental study -
correct answer ✅the researcher manipulates one of the variables
and tries to determine how the manipulation influences other
variables
Experimental factor -
correct answer ✅the treatment , is the explanatory variable that is
varied so that the effect on the response variable can be measured
treatment group -
correct answer ✅the group that receives the (experimental group)
treatment
, Stats Math225N Exam Questions And
Answers Latest 2025
control group -
correct answer ✅serves as a baseline or standard treatment that
can be used to compare it to other treatments
placebo -
correct answer ✅is an inert treatment that looks just like the
actual treatment. the placebo is given to the control group
blinding -
correct answer ✅a technique where the subjects do not know
whether they are receiving a treatment or a placebo
double blinding -
correct answer ✅occurs when neither the participant in the
experiment nor the person administering the treatments know if
the participant in the experiment
Explanatory variable -
correct answer ✅Attempts to explain/influence changes in
another variable
different values of the variable are called treatments
Explanatory variable is also the independent variable
Answers Latest 2025
Nominal Data -
correct answer ✅data of categories only. Data cannot be arranged
in an ordering scheme. (Gender, Race, Religion)
observational study -
correct answer ✅observes individuals and measures variables of
interest but does not attempt to influence the responses
experimental study -
correct answer ✅the researcher manipulates one of the variables
and tries to determine how the manipulation influences other
variables
Experimental factor -
correct answer ✅the treatment , is the explanatory variable that is
varied so that the effect on the response variable can be measured
treatment group -
correct answer ✅the group that receives the (experimental group)
treatment
, Stats Math225N Exam Questions And
Answers Latest 2025
control group -
correct answer ✅serves as a baseline or standard treatment that
can be used to compare it to other treatments
placebo -
correct answer ✅is an inert treatment that looks just like the
actual treatment. the placebo is given to the control group
blinding -
correct answer ✅a technique where the subjects do not know
whether they are receiving a treatment or a placebo
double blinding -
correct answer ✅occurs when neither the participant in the
experiment nor the person administering the treatments know if
the participant in the experiment
Explanatory variable -
correct answer ✅Attempts to explain/influence changes in
another variable
different values of the variable are called treatments
Explanatory variable is also the independent variable
