28 Questions
What is the total frequency of the data set?
50
What is the value of the class midpoint that has a frequency of 3?
112.5
What is the primary purpose of presenting data in a tabular or graphical format?
To derive logical and statistical conclusions from the collected measurements
What is the purpose of a cumulative frequency distribution table?
To show the accumulation of frequencies
What is the primary advantage of using a tabular presentation of data?
It allows for a large amount of data to be stored and reorganized in a neat format
What is the percentage of individuals with a systolic blood pressure less than 125 mm/Hg?
35%
What is the class interval of the data set that has a frequency of 6?
125-130
What is the purpose of a table note in a tabular presentation?
To provide additional information or clarification about the data
What is the last value in a cumulative frequency distribution table?
The total frequency of all the observations
What is the term for a table that displays the distribution of data in a cumulative manner?
Cumulative distribution table
What is the advantage of arranging data in ascending or descending order in a tabular presentation?
It makes it easier to draw conclusions from the data
What is the primary difference between a tabular and graphical presentation of data?
The method of presenting the data
What is a characteristic of a symmetric distribution?
One peak
What type of graph is used to display the proportion of patients living for a certain amount of time after treatment?
Kaplan-Meier Curve
What is the purpose of a pie chart?
To compare the proportion of different categories
What type of graph is used to display a trend over time?
Line chart
What is the purpose of transforming an S-shaped curve into a line graph?
To linearize the relationship between variables
What type of scale is used on a log-log graph?
Log-log scale
What is the purpose of a Kaplan-Meier Curve?
To measure the fraction of patients living for a certain amount of time after treatment
What is the main difference between a log-linear scale graph and a log-log scale graph?
The type of scale used on both axes
What is the primary purpose of a cumulative frequency distribution table?
To show the frequency of each category in a dataset
In a graphical presentation, which axis typically represents the subcategories of a variable?
X-axis
What type of graph is used to show the data in a frequency distribution table?
Histogram
What is the main difference between a bar chart and a histogram?
Bar charts are used for categorical data, while histograms are used for numerical data
What is the purpose of a frequency polygon?
To show the trend of the data
What is the result of joining the midpoints of a histogram with a straight line?
A frequency polygon
What type of graph is used to compare multiple sets of data?
Multiple bar chart
What is the purpose of a title in a graphical presentation?
To describe the content of the graph
Study Notes
Presentation of Data
- Presentation of data refers to the organization of data into tables, graphs, or charts to make logical and statistical conclusions easily derived from collected measurements.
- Tabular presentation: method of presenting data using statistical tables, allowing large amounts of data to be stored and reorganized in a neat format (columns and rows).
- Parts of a table:
- Title
- Subhead
- Table body
- Table note
- Types of tables:
- Array table
- Frequency distribution table
- Cumulative distribution table
Tabular Presentation Example
- Example table: systolic blood pressure of 50 normal individuals
- Frequency distribution table: shows the number of times a value occurs in the given data set
- Cumulative frequency distribution table: calculated by adding each frequency from a frequency distribution table to the sum of its predecessors
Graphical Presentation
- Graphical presentation: constructed in relation to two axes (X and Y) with subcategories of variables on the X-axis and frequency of categories on the Y-axis
- Types of graphical presentation:
- Bar chart: represents data or numbers with rectangular bars with heights or lengths proportional to the values they represent
- Histogram: shows the data in the frequency distribution table
- Frequency polygon: a line graph where frequency is plotted against class midpoint
- Frequency curve: obtained by drawing points smoothly by hand
- Pie chart: a circular statistical graphic divided into slices to illustrate numerical proportion
- Scatter plot: show the relationship between two variables
- Kaplan-Meier Curve (survival curve): measures the fraction of patients living for a certain amount of time after treatment
- Line chart: displays information as a series of data points connected by straight line segments
This quiz covers the organization of data into tables, graphs or charts to make logical and statistical conclusions. Topics include tabular and graphical presentation.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
