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STT 200 exam 1 Questions with Answers (100% Correct
Answers)
the placebo effect— Answer: treatment that gives no physiological
effect
single blind study— Answer: no one in the experiment except the
researchers and evaluators know the treatment condition
double blind study— Answer: no one in the experiment group knows
the treatment condition
confounding factor— Answer: when the treatment and control group
differ in some respect other than the treatment
anecdotal evidence— Answer: composed of unusual cases that are
recalled based on their striking characteristics
simple random sampling (SRS)— Answer: each possible sample of that
size has the same probability of selection
cluster sampling— Answer: randomly sample some clusters, then
observe all the elements in the chosen cluster
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, 2
systematic sampling— Answer: randomly select a fixed starting point
and then select every Kth person in the population (K is the population
size divided by the desired sample size)
convenience sampling— Answer: obtained by measuring whatever or
whoever is available to be measured
selected bias— Answer: occurs if the method for selecting the
participants produces a sample that does not represent the population
of interest
nonresponse bias— Answer: when a representative sample is chosen
for a survey, but a subset cannot be contacted or does not respond, the
subset differs in a meaningful way
responce bias— Answer: occurs when participants respond differently
from how they truly feel
categorical varibles— Answer: classifies cases into groups or
categories, placing each case into exactly one or two or more categories
numerical varible— Answer: measure or record a numerical quantity
for each case
nominal— Answer: has categories that do not have a natural order
© 2025 All rights reserved
STT 200 exam 1 Questions with Answers (100% Correct
Answers)
the placebo effect— Answer: treatment that gives no physiological
effect
single blind study— Answer: no one in the experiment except the
researchers and evaluators know the treatment condition
double blind study— Answer: no one in the experiment group knows
the treatment condition
confounding factor— Answer: when the treatment and control group
differ in some respect other than the treatment
anecdotal evidence— Answer: composed of unusual cases that are
recalled based on their striking characteristics
simple random sampling (SRS)— Answer: each possible sample of that
size has the same probability of selection
cluster sampling— Answer: randomly sample some clusters, then
observe all the elements in the chosen cluster
© 2025 All rights reserved
, 2
systematic sampling— Answer: randomly select a fixed starting point
and then select every Kth person in the population (K is the population
size divided by the desired sample size)
convenience sampling— Answer: obtained by measuring whatever or
whoever is available to be measured
selected bias— Answer: occurs if the method for selecting the
participants produces a sample that does not represent the population
of interest
nonresponse bias— Answer: when a representative sample is chosen
for a survey, but a subset cannot be contacted or does not respond, the
subset differs in a meaningful way
responce bias— Answer: occurs when participants respond differently
from how they truly feel
categorical varibles— Answer: classifies cases into groups or
categories, placing each case into exactly one or two or more categories
numerical varible— Answer: measure or record a numerical quantity
for each case
nominal— Answer: has categories that do not have a natural order
© 2025 All rights reserved
