frequency chart grouped data

There are three methods to find mean for a frequency distribution. (i) Direct method: where x is the mid-interval f is the frequency M is the mean (ii) Short-cut method: where A = assumed mean d = x - A (iii) Step-deviation method: where i = class size We illustrate eac..

The tally chart represents the favorite colors of a group of students. Which graph represents the data correctly? => Graph 4 or Graph 2 or Graph 1 or Graph 3..

A teacher gave a test to a class of 26 students. The maximum mark is 5. The marks obtained by the pupils are: Such data as above is called ungrouped (or raw) data. We may arrange the marks in ascending or descending order. The data so represented is called an array. Th..

Frequency Polygon - In a frequency distribution, the mid-value of each class is obtained. Then on the graph paper, the frequency is plotted against the corresponding mid-value. These points are joined by straight lines. These straight lines may be extended in both dire..

>Dotplots, back-to-back stemplots, parallel boxplots Comparing center and spread: within group, between group variation Comparing clusters and gaps Comparing outliners and other unusual features Comparing shapes Exploring bivariate data: Analyzing patterns in scatterpl..

Sometimes a circle is used to represent a given data. The various parts of it are proportionally represented by sectors of the circle. Then the graph is called a Pie Graph or Pie Chart..

Sometimes a circle is used to represent a given data. The various parts of it are proportionally represented by sectors of the circle. Then the graph is called a Pie Graph or Pie Chart..

There are two ways of constructing an ogive or cumulative frequency curve. (Ogive is pronounced as O-jive). The curve is usually of 'S' shape. We illustrate both methods by examples given below: Draw a 'less than' ogive curve for the following data..

The tally chart shows the number of students who participated in different sports. Which bar graph best represents the data shown on the tally chart? => Graph 1 or Graph 4 or Graph 2 or Graph 3..

Most people show lack of interest or have no time to go through facts and figures given in a daily newspaper or a magazine. But if these figures are graphically presented, they become easier to grasp and catch the eye and have a more lasting effect on the reader's mind. The graphical representation..