COMM 291 COMPREHENSIVE FINAL TEST
2026 TESTED QUESTIONS GRADED A+
◍ Ordinal Variable. Ans: Categorical or numerical values, used to
classify or identify. You can rank them and put them in order but you
can't do math.
◍ Identifier Variable. Ans: Unique string of numbers and or/letters
representing that name of the variable.
◍ What is it called if a population parameter is unknown, and a
sample static to estimate it?. Ans: Confidence Interval
◍ What is it called if a claim is made about a population parameter,
and we use a sample static to test it?. Ans: Hypothesis Test
◍ The larger a sample size is, the less ________________ it has and
it is described as?. Ans: Variability and standard error
◍ How big does a sample size need to be?. Ans: >30 according to
CTL
◍ What is the 10% condition?. Ans: Means we do not have to
sample over 10% of the population.
, ◍ What is a random sample?. Ans: A sample that is picked in a
totally random way and is totally unbiased.
◍ What is a Voluntary response and is it random sample?. Ans: No
because if someone want's to be a part of the study which is not
random.
◍ What is a Nonresponse bias?. Ans: People simply do not respond
to your survey
◍ What is undercoverage?. Ans: When a survey under-covers a
certain type or characteristic of the parts in a sample.
◍ What is Simple Random Sampling?. Ans: Selection of a random
amount of individuals from the sample is done randomly where a
random chance is applied to anyone.
◍ What is Systematic sampling?. Ans: When we select Xth number
of people on the list for the sample.
◍ What is Stratified sampling?. Ans: First, divide the population into
subgroups categorized by some characteristics. Then take an equal
amount from each segment and include it in your sample.
◍ What is cluster sampling?. Ans: Dividing the population into a
group/cluster then selecting a sample from each cluster
2026 TESTED QUESTIONS GRADED A+
◍ Ordinal Variable. Ans: Categorical or numerical values, used to
classify or identify. You can rank them and put them in order but you
can't do math.
◍ Identifier Variable. Ans: Unique string of numbers and or/letters
representing that name of the variable.
◍ What is it called if a population parameter is unknown, and a
sample static to estimate it?. Ans: Confidence Interval
◍ What is it called if a claim is made about a population parameter,
and we use a sample static to test it?. Ans: Hypothesis Test
◍ The larger a sample size is, the less ________________ it has and
it is described as?. Ans: Variability and standard error
◍ How big does a sample size need to be?. Ans: >30 according to
CTL
◍ What is the 10% condition?. Ans: Means we do not have to
sample over 10% of the population.
, ◍ What is a random sample?. Ans: A sample that is picked in a
totally random way and is totally unbiased.
◍ What is a Voluntary response and is it random sample?. Ans: No
because if someone want's to be a part of the study which is not
random.
◍ What is a Nonresponse bias?. Ans: People simply do not respond
to your survey
◍ What is undercoverage?. Ans: When a survey under-covers a
certain type or characteristic of the parts in a sample.
◍ What is Simple Random Sampling?. Ans: Selection of a random
amount of individuals from the sample is done randomly where a
random chance is applied to anyone.
◍ What is Systematic sampling?. Ans: When we select Xth number
of people on the list for the sample.
◍ What is Stratified sampling?. Ans: First, divide the population into
subgroups categorized by some characteristics. Then take an equal
amount from each segment and include it in your sample.
◍ What is cluster sampling?. Ans: Dividing the population into a
group/cluster then selecting a sample from each cluster
