BSTAT 3321- Test 3 correctly answered
already passed
Simple Random Sample - correct answer ✔✔a sample selected in such a way that every
possible item from a list has the same chance of selection (same probability). Ex: Raffle tickets
Stratified Random Sample - correct answer ✔✔separating the population into mutually
exclusive sets called Strata, then a drawing simple random sample from each stratum.
Strata - correct answer ✔✔mutually exclusive sets from a population. These stratas can be
categorized by race, sex, age etc. and simple random samples can be taken from each of these
stratas.
Cluster Sample - correct answer ✔✔A simple random sample of groups or clusters of elements.
Cluster sampling reduces costs but increases sampling errors.
Probability Samples - correct answer ✔✔Methods of selecting good representative samples
from the population. Includes simple random sampling, stratified random sampling, and cluster
sampling.
Non-probability Samples - correct answer ✔✔Items are selected without knowing their
probability of selection and so no inference can be made to the population of interest. Includes
convenience samples, judgement samples, and quota samples.
Sampling Error - correct answer ✔✔differences between the sample and population values
(between statistics and parameters). This error decreases with an increase in sample size.
already passed
Simple Random Sample - correct answer ✔✔a sample selected in such a way that every
possible item from a list has the same chance of selection (same probability). Ex: Raffle tickets
Stratified Random Sample - correct answer ✔✔separating the population into mutually
exclusive sets called Strata, then a drawing simple random sample from each stratum.
Strata - correct answer ✔✔mutually exclusive sets from a population. These stratas can be
categorized by race, sex, age etc. and simple random samples can be taken from each of these
stratas.
Cluster Sample - correct answer ✔✔A simple random sample of groups or clusters of elements.
Cluster sampling reduces costs but increases sampling errors.
Probability Samples - correct answer ✔✔Methods of selecting good representative samples
from the population. Includes simple random sampling, stratified random sampling, and cluster
sampling.
Non-probability Samples - correct answer ✔✔Items are selected without knowing their
probability of selection and so no inference can be made to the population of interest. Includes
convenience samples, judgement samples, and quota samples.
Sampling Error - correct answer ✔✔differences between the sample and population values
(between statistics and parameters). This error decreases with an increase in sample size.
