STAT 1000 MOCK EXAM QUESTIONS AND
100% CORRECT ANSWERS!!
Students were polled and asked, "where do you do most of your studying?" Some students
said home and others said the libraries at school. What is the variable of interest?
The variable of interest is the location where the students study
Sample
is a subset of units in a population that we examine in order to gather information about the
population
Categorical variable
Are variables in which observations are placed into one of several groups
Categorical Nominal
Data is recorded as labels
Examples
Gender
Marital Status
categorical Ordinal
Data follow a natural order and the order makes sense
Examples
Placing in a hockey tournament
Letter grade in a course
Is the location where the students study is it Ordinal or Nominal
Nominal because the order doesn't make sense, the location make sense as labels which are
nominal
Quantitative variables
, are variables which have values that are a count or are obtained by measurement, and it makes
sense to preform arithmetic calculations, such as adding or taking the average, on those values
Examples of Quantitative variables
Measurement
Distance ran
Square footage
Age
Distrubution
Of a variable tells us what values it takes and how often it takes on these values
What types of graphs do we use for Categorical variables
Bar Charts
Pie Charts
What type of graphs do we use for Quantitative variables
Histograms
Timeplots
Continuous variable
can take any value within a given range
Examples
Weight and Distance
Discrete variable
can only take a countable number of values
Examples included the number of children in a family and the number of days of rain in a month
What do we label the X and Y axis as in a histogram
X axis is the variable names
Y axis is the frequency or count
100% CORRECT ANSWERS!!
Students were polled and asked, "where do you do most of your studying?" Some students
said home and others said the libraries at school. What is the variable of interest?
The variable of interest is the location where the students study
Sample
is a subset of units in a population that we examine in order to gather information about the
population
Categorical variable
Are variables in which observations are placed into one of several groups
Categorical Nominal
Data is recorded as labels
Examples
Gender
Marital Status
categorical Ordinal
Data follow a natural order and the order makes sense
Examples
Placing in a hockey tournament
Letter grade in a course
Is the location where the students study is it Ordinal or Nominal
Nominal because the order doesn't make sense, the location make sense as labels which are
nominal
Quantitative variables
, are variables which have values that are a count or are obtained by measurement, and it makes
sense to preform arithmetic calculations, such as adding or taking the average, on those values
Examples of Quantitative variables
Measurement
Distance ran
Square footage
Age
Distrubution
Of a variable tells us what values it takes and how often it takes on these values
What types of graphs do we use for Categorical variables
Bar Charts
Pie Charts
What type of graphs do we use for Quantitative variables
Histograms
Timeplots
Continuous variable
can take any value within a given range
Examples
Weight and Distance
Discrete variable
can only take a countable number of values
Examples included the number of children in a family and the number of days of rain in a month
What do we label the X and Y axis as in a histogram
X axis is the variable names
Y axis is the frequency or count
