ELEMENTARY STATISTICS PICTURING THE
WORLD ACTUAL TEST 2026 VERIFIED
QUESTIONS AND ANSWERS COMPREHENSIVE
STUDY GUIDE
◉ statistics.
Answer: -the science of collecting, organizing, analyzing, and
interpreting data in order to make decisions
-derived from the Latin word "status" meaning state
involves more of counting births & deaths
-divided into 2 fields (descriptive & inferential)
◉ data sets.
Answer: two types used to study in statistics:
-population
-samples
◉ population.
Answer: the collection of ALL outcomes, responses, measurements,
or counts that are of interest
,◉ Population Example:
EX: the amount of energy collected from every wind turbine on a
wind farm...what is the population?.
Answer: The energy amounts are a population bc the amounts
represent a collection of amounts from ALL the wind turbines on the
farm
◉ sample.
Answer: -a subset, or part, of a population
-should be a representative of a population so it can be used to draw
conclusions about population
"Random sampling" is an appropriate method of ____
-a sample is used more than population bc data is used to draw
conclusions about a population
◉ Sample Example:
A survey of 500 spectators from a stadium with 42,000
spectators...what is the sample?.
Answer: The survey of 500 spectators is a sample bc it is a subset, or
part, of the population of 42,000 spectators at the stadium
◉ Data Set Examples:
,A survey of 1015 U.S. adults found that 32% have had to put off
medical care for themselves or their family in the past year due to
cost. What are the data sets?.
Answer: Population: results from all adults in U.S.
Sample: results from the 1015 U.S. adults included in the survey
◉ Data Set Examples:
In a survey, 614 small business owners in the US were asked
whether they thought their companys FB presence was valuable.
258 of the 614 said yes.
What is the population and sample & describe the sample data set?.
Answer: The population consists of the responses of all small
business owners in the US.
The sample consists of the 614 responses of the small business
owners in the survey.
**The sample is a subset of responses of business owners in the
US...the sample data set consists of 258 "yes" owners & 356 owners
who said "no"
◉ parameter.
Answer: a numerical description of a POPULATION characteristic
◉ Parameter Example:
, In January 2013, 60% of the governors of the 50 states in the USA
were republicans. What is the Parameter?.
Answer: The 60% is the PARAMETER. It is the numerical description
of the total number of governors
◉ statistic.
Answer: a numerical description of a SAMPLE characteristic
◉ Statistic Example:
The average annual salary for 35 of a company's 1200 accountants is
$68,000. What is the Statistic?.
Answer: The $68,000 is a STATISTIC. It is a numerical description of
a sample of annual salaries
◉ Descriptive Statistics.
Answer: is a branch of statistics that involves organization,
summarization, and display of data.
◉ Descriptive Stats Example:
A survey of 202 pilots found that 20% admit that they have made a
serious error due to sleepiness. What is the descriptive statistic?.
Answer: The statement "20% admit that they have made serious
errors due to sleepiness" is a descriptive statistic.
WORLD ACTUAL TEST 2026 VERIFIED
QUESTIONS AND ANSWERS COMPREHENSIVE
STUDY GUIDE
◉ statistics.
Answer: -the science of collecting, organizing, analyzing, and
interpreting data in order to make decisions
-derived from the Latin word "status" meaning state
involves more of counting births & deaths
-divided into 2 fields (descriptive & inferential)
◉ data sets.
Answer: two types used to study in statistics:
-population
-samples
◉ population.
Answer: the collection of ALL outcomes, responses, measurements,
or counts that are of interest
,◉ Population Example:
EX: the amount of energy collected from every wind turbine on a
wind farm...what is the population?.
Answer: The energy amounts are a population bc the amounts
represent a collection of amounts from ALL the wind turbines on the
farm
◉ sample.
Answer: -a subset, or part, of a population
-should be a representative of a population so it can be used to draw
conclusions about population
"Random sampling" is an appropriate method of ____
-a sample is used more than population bc data is used to draw
conclusions about a population
◉ Sample Example:
A survey of 500 spectators from a stadium with 42,000
spectators...what is the sample?.
Answer: The survey of 500 spectators is a sample bc it is a subset, or
part, of the population of 42,000 spectators at the stadium
◉ Data Set Examples:
,A survey of 1015 U.S. adults found that 32% have had to put off
medical care for themselves or their family in the past year due to
cost. What are the data sets?.
Answer: Population: results from all adults in U.S.
Sample: results from the 1015 U.S. adults included in the survey
◉ Data Set Examples:
In a survey, 614 small business owners in the US were asked
whether they thought their companys FB presence was valuable.
258 of the 614 said yes.
What is the population and sample & describe the sample data set?.
Answer: The population consists of the responses of all small
business owners in the US.
The sample consists of the 614 responses of the small business
owners in the survey.
**The sample is a subset of responses of business owners in the
US...the sample data set consists of 258 "yes" owners & 356 owners
who said "no"
◉ parameter.
Answer: a numerical description of a POPULATION characteristic
◉ Parameter Example:
, In January 2013, 60% of the governors of the 50 states in the USA
were republicans. What is the Parameter?.
Answer: The 60% is the PARAMETER. It is the numerical description
of the total number of governors
◉ statistic.
Answer: a numerical description of a SAMPLE characteristic
◉ Statistic Example:
The average annual salary for 35 of a company's 1200 accountants is
$68,000. What is the Statistic?.
Answer: The $68,000 is a STATISTIC. It is a numerical description of
a sample of annual salaries
◉ Descriptive Statistics.
Answer: is a branch of statistics that involves organization,
summarization, and display of data.
◉ Descriptive Stats Example:
A survey of 202 pilots found that 20% admit that they have made a
serious error due to sleepiness. What is the descriptive statistic?.
Answer: The statement "20% admit that they have made serious
errors due to sleepiness" is a descriptive statistic.
