OPRE 3360 Exam 1 Questions With Complete Solutions
Bar Charts Correct Answers A graphical device for depicting
categorical data summarized in a frequency, relative frequency
or percent frequency distribution.
Categorical Data Correct Answers - referred to as qualitative
data
-labels/names used to identify an attribute of elements
- Uses either nominal or ordinal scale of measurement
- Appropriate statistical analysis are rather limited
Cross-Sectional Data Correct Answers data collected at the
same or approximately the same point in time.
Crosstabulation Correct Answers - A tabular summary of data
for 2 variables.
- Can be used for both categorical and quantitative data.
- The left and top margin labels define the classes for the 2
variables.
Cumulative Distributions Correct Answers - A variation of the
frequency distribution
- Uses same methods to determine:
> # of classes
> Class width
> Class Limits
- Displays the frequency of data items with values less than or
equal to the upper class limit of each class.
, Data Correct Answers the facts and figures collected, analyzed,
and summarized for presentation and interpretation.
Data Set Correct Answers All the data collected in a particular
study
Data Values Correct Answers number of elements x number of
variables
Detecting Outliers (Box Plot Method) Correct Answers -
Outlier limits determined using IQR
- Data outside the box of a distance of more than 1.5X the IQR
are considered Outliers
> lower limit: Q1 - 1.5(IQR)
> upper limit: Q3 + 1.5(IQR)
Detecting Outliers (Z-score Method) Correct Answers - a data
value with a z-score < -3 or > +3 might be considered an outlier.
Elements Correct Answers entities on which data is collected
Frequency Distribution (Quantitative data) Correct Answers 3
steps to define classes for frequency distribution using
quantitative data:
1) Determine # of non-overlapping classes
> as a general guideline use between 5-20 classes
2) Determine width of each class
> Approx. class width = (largest data value - smallest data
value)/ # of classes
Bar Charts Correct Answers A graphical device for depicting
categorical data summarized in a frequency, relative frequency
or percent frequency distribution.
Categorical Data Correct Answers - referred to as qualitative
data
-labels/names used to identify an attribute of elements
- Uses either nominal or ordinal scale of measurement
- Appropriate statistical analysis are rather limited
Cross-Sectional Data Correct Answers data collected at the
same or approximately the same point in time.
Crosstabulation Correct Answers - A tabular summary of data
for 2 variables.
- Can be used for both categorical and quantitative data.
- The left and top margin labels define the classes for the 2
variables.
Cumulative Distributions Correct Answers - A variation of the
frequency distribution
- Uses same methods to determine:
> # of classes
> Class width
> Class Limits
- Displays the frequency of data items with values less than or
equal to the upper class limit of each class.
, Data Correct Answers the facts and figures collected, analyzed,
and summarized for presentation and interpretation.
Data Set Correct Answers All the data collected in a particular
study
Data Values Correct Answers number of elements x number of
variables
Detecting Outliers (Box Plot Method) Correct Answers -
Outlier limits determined using IQR
- Data outside the box of a distance of more than 1.5X the IQR
are considered Outliers
> lower limit: Q1 - 1.5(IQR)
> upper limit: Q3 + 1.5(IQR)
Detecting Outliers (Z-score Method) Correct Answers - a data
value with a z-score < -3 or > +3 might be considered an outlier.
Elements Correct Answers entities on which data is collected
Frequency Distribution (Quantitative data) Correct Answers 3
steps to define classes for frequency distribution using
quantitative data:
1) Determine # of non-overlapping classes
> as a general guideline use between 5-20 classes
2) Determine width of each class
> Approx. class width = (largest data value - smallest data
value)/ # of classes
