Statistics Wk 1–3 –
Complete Study Guide,
Review, Practice
Questions & Answers
Updated Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
, T or F: false
Data is a subset of the population studied A sample is defined as a subset of the population studied. Data is defined as a set
of observations or possible outcomes.
Raymond wants to estimate the percentage of parents that
use cloth diapers. He asks a randomly selected group of
200 parents whether or not they use cloth diapers. What is
the parameter?
A parameter is a number that is a property of the population.
Sometimes, when the population is small enough, there is no need to take a
sample, and so determining a parameter is easier and a more accurate reflection of
the population. A statistic is a number that represents a property of the sample. The
statistic is an estimate of a population parameter.
A statistic and a parameter are both descriptions of groups, but they represent different groups
Data are information about.... populations or samples. Generally, there are unknown characteristics, or variables,
about a population that we wish to know. To obtain this information, we collect data
by sampling some members of a population. Once collected, the data are used as
the actual values of the variables. Data may be numbers (quantitative data) or they
may be words (qualitative data)
Data Facts and statistics collected together for reference or analysis
You want to find the average test score of the students in Parameter: There is no parameter in this scenario.
every math class in 11th grade. There are 15 math classes
in 11th grade. You survey the scores of 7 math classes, The sample of 7 math classes is a portion of the total population (15 math classes).
and you calculate that the average test score is 83%.
A parameter is a number that is representative of the population, but the 83% is the
Which of the following represent the sample and the average test score determined from the sample. 83% is the statistic here, because it
parameter in this scenario? is a number that represents the sample.
There are 6000 people who attended a political debate at The 6000 people attending the debate
a convention center. There are three candidates who are
participating in the debate - Mr. Smith, Mr. Jones, or Ms.
Roberts. You want to find out which candidate is most The three candidates should not be surveyed in order to determine which candidate
popular amongst the people attending. You ask 500 people is most popular amongst the people attending. The population is the total number of
as they walk into the convention center. people who are attending the political debate.
In order to study the shoe sizes of people in his town, Billy Stratified sampling
samples the population by dividing the residents by age
and randomly selecting a proportionate number of This scenario demonstrates stratified sampling. Stratified sampling involves dividing
residents from each age group. Which type of sampling is the population into groups and randomly selecting a proportionate number of
used? individuals from each group
systematic sampling A procedure in which the selected sampling units are spaced regularly throughout
the population; that is, every n'th unit is selected.
Stratified sampling a variation of random sampling; the population is divided into subgroups and
weighted based on demographic characteristics of the national population
conveinance sampling is a non-probability sampling technique where subjects are selected because of
their convenient accessibility and proximity to the researcher.
Complete Study Guide,
Review, Practice
Questions & Answers
Updated Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
, T or F: false
Data is a subset of the population studied A sample is defined as a subset of the population studied. Data is defined as a set
of observations or possible outcomes.
Raymond wants to estimate the percentage of parents that
use cloth diapers. He asks a randomly selected group of
200 parents whether or not they use cloth diapers. What is
the parameter?
A parameter is a number that is a property of the population.
Sometimes, when the population is small enough, there is no need to take a
sample, and so determining a parameter is easier and a more accurate reflection of
the population. A statistic is a number that represents a property of the sample. The
statistic is an estimate of a population parameter.
A statistic and a parameter are both descriptions of groups, but they represent different groups
Data are information about.... populations or samples. Generally, there are unknown characteristics, or variables,
about a population that we wish to know. To obtain this information, we collect data
by sampling some members of a population. Once collected, the data are used as
the actual values of the variables. Data may be numbers (quantitative data) or they
may be words (qualitative data)
Data Facts and statistics collected together for reference or analysis
You want to find the average test score of the students in Parameter: There is no parameter in this scenario.
every math class in 11th grade. There are 15 math classes
in 11th grade. You survey the scores of 7 math classes, The sample of 7 math classes is a portion of the total population (15 math classes).
and you calculate that the average test score is 83%.
A parameter is a number that is representative of the population, but the 83% is the
Which of the following represent the sample and the average test score determined from the sample. 83% is the statistic here, because it
parameter in this scenario? is a number that represents the sample.
There are 6000 people who attended a political debate at The 6000 people attending the debate
a convention center. There are three candidates who are
participating in the debate - Mr. Smith, Mr. Jones, or Ms.
Roberts. You want to find out which candidate is most The three candidates should not be surveyed in order to determine which candidate
popular amongst the people attending. You ask 500 people is most popular amongst the people attending. The population is the total number of
as they walk into the convention center. people who are attending the political debate.
In order to study the shoe sizes of people in his town, Billy Stratified sampling
samples the population by dividing the residents by age
and randomly selecting a proportionate number of This scenario demonstrates stratified sampling. Stratified sampling involves dividing
residents from each age group. Which type of sampling is the population into groups and randomly selecting a proportionate number of
used? individuals from each group
systematic sampling A procedure in which the selected sampling units are spaced regularly throughout
the population; that is, every n'th unit is selected.
Stratified sampling a variation of random sampling; the population is divided into subgroups and
weighted based on demographic characteristics of the national population
conveinance sampling is a non-probability sampling technique where subjects are selected because of
their convenient accessibility and proximity to the researcher.
