UTK STAT 201 EXAM 2 QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
Population - Answersan entire group of individual persons, objects, or items from which samples may
be drawn
Sample - Answerssmaller group selected from the original population
Who you want to ask - Answerspopulation
Who you can ask - Answerssample frame
Sample Surveys - Answersdesigned to ask questions of a small group of people in the hope of learning
something about the entire population
Who you actually ask - Answerssample
Sampling methods that tend to over- or under-emphasize some characteristics of the population -
AnswersBiased
Protects us from the influences of all the features of our population by making sure that, on average,
the sample looks like the rest of the population - AnswersRandomization
The number of individuals in the sample - Answerssample size
including everyone and then sampling the entire population - Answerscensus
A parameter used in a model for a population - Answerspopulation parameter
any summary found from the data - Answerssample statistic
Reduce sampling variability by identifying homogeneous subgroups and then randomly sampling
within each - AnswersStratified samples
Randomly selecting among heterogeneous subgroups - AnswersCluster samples
Combine several random sampling methods - Answersmultistage samples
samples that don't represent the population of interest - Answersbad sampling frames
when individuals from a subgroup of the population are selected less often than they should be -
Answersundercoverage
Respondents' answers might be affected by external influences, such as question wording or
interviewer behavior - Answersresponse bias
To multiply the probability of A and B, the two events must be - Answersindependent
the probability of A or B and C - AnswersP(A)+P(B)*P(C)
First you acknowledge a difference within the population and then take a sample within groups -
Answersstratified
A researched decides to take 5 mile segments of roads and sample each one mile segment within -
Answerscluster sampling
A researcher selects their sample based on the percentage of highway, county, and city roads -
Answersstratified
A researched selects the first 20 roads next to their house - Answersconvenience
A researched selects every 5th road on the listing of roads - Answerssystematic
A researcher lists all roads and randomizes the order then selects the first 50 roads - AnswersSimple
random
What we want to know about a population - Answersparameter of interest
Mean, standard deviation, percentile, percent, or some other function of the population distribution -
Answerspopulation parameter
T/F Greek letters are used to denote parameters - Answerstrue
T/F Greek letters are used to denote statistics - AnswersFalse
T/F Latin letters are used to denote statistics - AnswersTrue
T/F The size of the sample and how the sample was obtained make the difference in sampling -
AnswersTrue
The sample includes people with a strong interest or opinion in the topic - Answersvoluntary response
sampling
Those that don't respond to the sample differ in their opinions that do - AnswersNon-response
Elements of the population are enumerated and each member of the population has the same
probability of being selected - AnswersSimple random sampling
Each element of the population is enumerated and every k-th element of the population is sampled
from a randomly determined starting point - AnswersSystematic
a few clusters of the population are selected at random and then a complete census is done within
each cluster - AnswersCluster
Population - Answersan entire group of individual persons, objects, or items from which samples may
be drawn
Sample - Answerssmaller group selected from the original population
Who you want to ask - Answerspopulation
Who you can ask - Answerssample frame
Sample Surveys - Answersdesigned to ask questions of a small group of people in the hope of learning
something about the entire population
Who you actually ask - Answerssample
Sampling methods that tend to over- or under-emphasize some characteristics of the population -
AnswersBiased
Protects us from the influences of all the features of our population by making sure that, on average,
the sample looks like the rest of the population - AnswersRandomization
The number of individuals in the sample - Answerssample size
including everyone and then sampling the entire population - Answerscensus
A parameter used in a model for a population - Answerspopulation parameter
any summary found from the data - Answerssample statistic
Reduce sampling variability by identifying homogeneous subgroups and then randomly sampling
within each - AnswersStratified samples
Randomly selecting among heterogeneous subgroups - AnswersCluster samples
Combine several random sampling methods - Answersmultistage samples
samples that don't represent the population of interest - Answersbad sampling frames
when individuals from a subgroup of the population are selected less often than they should be -
Answersundercoverage
Respondents' answers might be affected by external influences, such as question wording or
interviewer behavior - Answersresponse bias
To multiply the probability of A and B, the two events must be - Answersindependent
the probability of A or B and C - AnswersP(A)+P(B)*P(C)
First you acknowledge a difference within the population and then take a sample within groups -
Answersstratified
A researched decides to take 5 mile segments of roads and sample each one mile segment within -
Answerscluster sampling
A researcher selects their sample based on the percentage of highway, county, and city roads -
Answersstratified
A researched selects the first 20 roads next to their house - Answersconvenience
A researched selects every 5th road on the listing of roads - Answerssystematic
A researcher lists all roads and randomizes the order then selects the first 50 roads - AnswersSimple
random
What we want to know about a population - Answersparameter of interest
Mean, standard deviation, percentile, percent, or some other function of the population distribution -
Answerspopulation parameter
T/F Greek letters are used to denote parameters - Answerstrue
T/F Greek letters are used to denote statistics - AnswersFalse
T/F Latin letters are used to denote statistics - AnswersTrue
T/F The size of the sample and how the sample was obtained make the difference in sampling -
AnswersTrue
The sample includes people with a strong interest or opinion in the topic - Answersvoluntary response
sampling
Those that don't respond to the sample differ in their opinions that do - AnswersNon-response
Elements of the population are enumerated and each member of the population has the same
probability of being selected - AnswersSimple random sampling
Each element of the population is enumerated and every k-th element of the population is sampled
from a randomly determined starting point - AnswersSystematic
a few clusters of the population are selected at random and then a complete census is done within
each cluster - AnswersCluster
