Math 120 Study Guide Questions with Verified
Correct Answers
Statistics
Is the science of collecting, organizing, summarizing, and analyzing information to draw
conclusions or answer questions
Population
The entire group to be studied is called
Ex: Taking a survey of the whole elementary school of their favorite ice cream
Sample
Is a subset of the population that is being studied
Ex: Out of the whole elementary school 50 students were chosen to participate in a survey
Descriptive Statistics
Consist of organizing and summarizing data. Describes data through numerical summaries,
tables, and graphs
Parameter
Is a numerical summary of a population
Ex: Suppose 48.2% of all students on your campus own a car. This is numerical summary of
the population
Inferential Statistic
, Use methods that take a result from a sample, extend it to the population, and measure the
reliability of the result
Ex: Rather than saying that 78% fo all students would return the money. We might say that
between 74% and 82% fo all students would return the money
Statistic
Is a numerical summary of a sample
Ex: Suppose a sample of 100 students is obtained , and from this sample we find that 46%
own a car
Explanatory variable
is one that explains changes in that variable.
Response variable
is the focus of a question in a study or experiment.
Qualitative variable
allow for classification of individuals based on some attribute or characteristics
Quantitative variable
provide numerical measures of individuals
Discrete variable
is a quantitative variable that has either a finite number of possible values or countable
number of possible values. Cannot take on every possible value between any two possible
values
Correct Answers
Statistics
Is the science of collecting, organizing, summarizing, and analyzing information to draw
conclusions or answer questions
Population
The entire group to be studied is called
Ex: Taking a survey of the whole elementary school of their favorite ice cream
Sample
Is a subset of the population that is being studied
Ex: Out of the whole elementary school 50 students were chosen to participate in a survey
Descriptive Statistics
Consist of organizing and summarizing data. Describes data through numerical summaries,
tables, and graphs
Parameter
Is a numerical summary of a population
Ex: Suppose 48.2% of all students on your campus own a car. This is numerical summary of
the population
Inferential Statistic
, Use methods that take a result from a sample, extend it to the population, and measure the
reliability of the result
Ex: Rather than saying that 78% fo all students would return the money. We might say that
between 74% and 82% fo all students would return the money
Statistic
Is a numerical summary of a sample
Ex: Suppose a sample of 100 students is obtained , and from this sample we find that 46%
own a car
Explanatory variable
is one that explains changes in that variable.
Response variable
is the focus of a question in a study or experiment.
Qualitative variable
allow for classification of individuals based on some attribute or characteristics
Quantitative variable
provide numerical measures of individuals
Discrete variable
is a quantitative variable that has either a finite number of possible values or countable
number of possible values. Cannot take on every possible value between any two possible
values
