STAT 1000 EXAM 7 QUESTIONS AND 100%
CORRECT ANSWERS!!
What is stats?
Set of methods for obtaining, organizing, summarizing, presenting and analyze data
What are individuals and units?
Can be nearly anything: people, animals, places, things
Where does data come from?
Individuals and units
What is population?
Is the totality of individuals about which we want info
What is a sample?
Is a subset of the units in a population that we actually examine in order to gather info
What is a variable?
Characteristic or property of an individual
Takes different values
"Hair colour" variable has "brown" "blonde" etc values
What are the 2 broad classifications of data?
Categorical and quantitative
What is categorical data?
Represents values of categorical/qualitative variables
These are variables that place individuals into one of several groups
What is categorical and ordinal?
If there is a logical ordering to the values of a categorical variable
, What is categorical and nominal?
If there is not a logical ordering to the values of a categorical variable
What is quantitative data?
Represents values of quantitative variables
These are variables that take numerical values for which arithmetic operations (adding,
subtracting, averaging) make sense
What does distribution of a data set tell us?
What values a variable takes and how often it takes these values
Value does not necessarily have to be...
A number
What are the different techniques to use to visually display data sets?
Bar charts
Pie chart
Frequency distribution
Relative frequency distrib.
Histograms
Time plots
What is a bar chart?
Burchart display variable values on one access and frequencies on the other
Do bars in a bar chart touch?
No
Can you flip the axis on a bar chart?
Yes, but then the bars will be horizontal
What is a pie chart?
CORRECT ANSWERS!!
What is stats?
Set of methods for obtaining, organizing, summarizing, presenting and analyze data
What are individuals and units?
Can be nearly anything: people, animals, places, things
Where does data come from?
Individuals and units
What is population?
Is the totality of individuals about which we want info
What is a sample?
Is a subset of the units in a population that we actually examine in order to gather info
What is a variable?
Characteristic or property of an individual
Takes different values
"Hair colour" variable has "brown" "blonde" etc values
What are the 2 broad classifications of data?
Categorical and quantitative
What is categorical data?
Represents values of categorical/qualitative variables
These are variables that place individuals into one of several groups
What is categorical and ordinal?
If there is a logical ordering to the values of a categorical variable
, What is categorical and nominal?
If there is not a logical ordering to the values of a categorical variable
What is quantitative data?
Represents values of quantitative variables
These are variables that take numerical values for which arithmetic operations (adding,
subtracting, averaging) make sense
What does distribution of a data set tell us?
What values a variable takes and how often it takes these values
Value does not necessarily have to be...
A number
What are the different techniques to use to visually display data sets?
Bar charts
Pie chart
Frequency distribution
Relative frequency distrib.
Histograms
Time plots
What is a bar chart?
Burchart display variable values on one access and frequencies on the other
Do bars in a bar chart touch?
No
Can you flip the axis on a bar chart?
Yes, but then the bars will be horizontal
What is a pie chart?
