Statistical Graphs PDF

Frequency Distribution Table A statistical table is used to organize data and to display it graphically. A frequency distribution table is a statistical table that deals with the frequency or number of occurrences of a given variable for a specific experimental unit. 01 Statistical...

Frequency Distribution Table A statistical table is used to organize data and to display it graphically. A frequency distribution table is a statistical table that deals with the frequency or number of occurrences of a given variable for a specific experimental unit. 01 Statistical Graphs RIZAL NATIONAL SCIENCE HIGH SCHOOL MELC Uses appropriate graphs to represent organized data: bar graph, histogram, line graph, frequency ogive, and pie graph. Learning Objectives: 1. Enumerate the types of Statistical Graphs 2. Use the appropriate graphs to represent organized data. 3. Recognize the use of the appropriate graphs to represent organized data.  BAR GRAPH Bar graphs are used to show the comparison of nominal data, such as nationality, gender, religion, etc., and numerical data - discrete or continuous such as populations and other frequency information.  HISTOGRA M is a bar graph- A histogram like representation of a frequency distribution. The rectangular bars are without space between them. The height of each bar corresponds to the frequency of the class and the width corresponds to the interval of the class.  FREQUENCY POLYGON Is a line graph where the frequency of each class is plotted against the corresponding class mark. It is also used to represent changes in data over a period of time. Data like changes in temperature, income, population, etc.  FREQUENCY OGIVE Is a line graph where the cumulative frequency of each class is plotted against the corresponding class boundary. Since the cumulative frequency is a non- decreasing function, the graph of the frequency ogive will also be non-decreasing.  PIE CHART Pie Chart or Circle Graph is best used to compare parts of a whole. The size of each sector of the circle is proportional to the size of the category that it represents.  PICTOGRAP H graph It is a picture used to show numerical data through symbols. The legend is also a very important part of a pictograph for this will tell the reader the proportionality of the symbol used to represent the actual data.  Stem and Leaf Plot is a unique table in which each data value is divided into a "stem" (the first digit or digits) and a "leaf" (typically the last digit). Interpretation of Statistical Graphs  Statistical Graph is one of the most significant components of data presentation and analysis to expose structure and trends. Moreover, statistical graphs enable data to be displayed in various visual formats. In this lesson, students will learn to recognize the key elements of a statistical graph and how to interpret the data presented within it.  Graphical Interpretation The graph above displays the number of days each type of weather occurred in a month. To better understand what the graph means, we first need to locate the units on the two-axis labels.Then, look at the bars that represent each unit. The height of the bars shows the number of days each type of weather occurred in the month. In the graph, rainy days have the highest number with 10 days, and cloudy days have the lowest with 3 days.  Interpretation: The graph above shows that there were 5 days of sunny days, 10 days of rainy days, and 5 windy days which were fewer than rainy days. There were 3 cloudy days which has the shortest number of days. 1.Which month has the lowest number of machines sold? 2.What is the highest number of machines sold? 3.Which months have the same number of machines sold?  Interpretation: The graph above shows the number of machines sold over six months. Based on the graph, the month of May has the lowest number of machines sold. Moreover, within these six months, the highest number of machines sold is 50, occurring in the months of January and June.