Elementary Statistics Exam Questions and Answers Latest Update 2025
Statistics is - Answers the science of collecting, analyzing, presenting,
and interpreting data, as well as of making decisions based
on such analyses.
Descriptive Statistics - Answers consists of methods for organizing, displaying, and describing data by
using tables, graphs, and
summary measures.
Inferential Statistics - Answers consists of methods that use sample
results to help make decisions or predictions about a population. *straight forward data
sample - Answers A portion of the population selected for study is referred to as a?
census - Answers A survey that includes every member of the population is called a ?
sample survey - Answers The technique of collecting information
from a portion of the population is called?
representative sample - Answers A sample that represents the characteristics of the population
as closely as possible is called a
random sample - Answers A sample drawn in such a way that each element of the population has a
chance of being selected is called a
nonrandom - Answers In this type of sample, some members of the population may not have any chance
of being selected in the sample.
simple random sampling, systematic random sampling, stratified random sample, cluster sampling -
Answers What are four ways to select random samples?
simple random sampling. - Answers If all samples of the same size selected from a population have the
same chance of being selected, we call it?
systematic random sampling - Answers When we first randomly select
one member from the first k units. Then every kth member, starting with the first selected member, is
included in the sample it is called?
stratified random sample - Answers A sample where we first divide the
, population into subpopulations, which are called strata. Then, one sample is selected from each of these
strata. The collection of all samples from all strata gives the stratified random sample.
Two types of nonrandom samples - Answers a convenience sample and judgement sample.
convenience sample - Answers the most accessible members of
a population are selected to obtain the results quickly.
judgement sample - Answers the members are selected from
the population based upon the judgement and prior knowledge of an expert.
quota sample - Answers For this sample, we divide the target population into different subpopulations
based on certain characteristics. Then we select a subsample from each subpopulation in such a way
that each subpopulation is represented in the sample in
exactly the same proportion as in the target population.
A sample may be selected with replacement. - Answers each time we select an element from the
population, we put it back in the population before we select the next element.
Sampling without replacement - Answers occurs when the selected element is not replaced in the
population.
sampling and nonsampling errors. - Answers The results obtained from a sample survey may contain two
types of errors:
The sampling error - Answers is the difference between the result
obtained from a sample survey and the result that would
have been obtained if the whole population had been
included in the survey.
nonsampling errors. - Answers The errors that occur in the collection, recording, and
tabulation of the data are called?
There are four types of nonsampling errors - Answers selection error, nonresponse error, response
error, voluntary response error
Voluntary response error - Answers occurs when a survey is not conducted on a randomly selected
sample but a questionnaire is published in a magazine or newspaper and
people are invited to respond to that questionnaire.
Statistics is - Answers the science of collecting, analyzing, presenting,
and interpreting data, as well as of making decisions based
on such analyses.
Descriptive Statistics - Answers consists of methods for organizing, displaying, and describing data by
using tables, graphs, and
summary measures.
Inferential Statistics - Answers consists of methods that use sample
results to help make decisions or predictions about a population. *straight forward data
sample - Answers A portion of the population selected for study is referred to as a?
census - Answers A survey that includes every member of the population is called a ?
sample survey - Answers The technique of collecting information
from a portion of the population is called?
representative sample - Answers A sample that represents the characteristics of the population
as closely as possible is called a
random sample - Answers A sample drawn in such a way that each element of the population has a
chance of being selected is called a
nonrandom - Answers In this type of sample, some members of the population may not have any chance
of being selected in the sample.
simple random sampling, systematic random sampling, stratified random sample, cluster sampling -
Answers What are four ways to select random samples?
simple random sampling. - Answers If all samples of the same size selected from a population have the
same chance of being selected, we call it?
systematic random sampling - Answers When we first randomly select
one member from the first k units. Then every kth member, starting with the first selected member, is
included in the sample it is called?
stratified random sample - Answers A sample where we first divide the
, population into subpopulations, which are called strata. Then, one sample is selected from each of these
strata. The collection of all samples from all strata gives the stratified random sample.
Two types of nonrandom samples - Answers a convenience sample and judgement sample.
convenience sample - Answers the most accessible members of
a population are selected to obtain the results quickly.
judgement sample - Answers the members are selected from
the population based upon the judgement and prior knowledge of an expert.
quota sample - Answers For this sample, we divide the target population into different subpopulations
based on certain characteristics. Then we select a subsample from each subpopulation in such a way
that each subpopulation is represented in the sample in
exactly the same proportion as in the target population.
A sample may be selected with replacement. - Answers each time we select an element from the
population, we put it back in the population before we select the next element.
Sampling without replacement - Answers occurs when the selected element is not replaced in the
population.
sampling and nonsampling errors. - Answers The results obtained from a sample survey may contain two
types of errors:
The sampling error - Answers is the difference between the result
obtained from a sample survey and the result that would
have been obtained if the whole population had been
included in the survey.
nonsampling errors. - Answers The errors that occur in the collection, recording, and
tabulation of the data are called?
There are four types of nonsampling errors - Answers selection error, nonresponse error, response
error, voluntary response error
Voluntary response error - Answers occurs when a survey is not conducted on a randomly selected
sample but a questionnaire is published in a magazine or newspaper and
people are invited to respond to that questionnaire.
