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All right reserved. All material given in this website is a property of physicscatalyst. Features of the data Statistics deals with collection, presentation, analysis and interpretation of numerical data. Arranging data in a order to study their salient features is called presentation of data. Data arranged in ascending or descending order is called arrayed data or an array Range of the data is the difference between the maximum and the minimum values of the observations Table that shows the frequency of different values in the given data is called a frequency distribution table A frequency distribution table that shows the frequency of each individual value in the given data is called an ungrouped frequency distribution table.
A table that shows the frequency of groups of values in the given data is called a grouped frequency distribution table The groupings used to group the values in given data are called classes or class-intervals.
The number of values that each class contains is called the class size or class width. The lower value in a class is called the lower class limit. The higher value in a class is called the upper class limit. Class mark of a class is the mid value of the two limits of that class.
A frequency distribution in which the upper limit of one class differs from the lower limit of the succeeding class is called an Inclusive or discontinuous Frequency Distribution. A frequency distribution in which the upper limit of one class coincides from the lower limit of the succeeding class is called an exclusive or continuous Frequency Distribution Bar Graph: A bar graph is a pictorial representation of data in which rectangular bars of uniform width are drawn with equal spacing between them on one axis, usually the x axis.
The value of the variable is shown on the other axis that is the y axis. Histogram: A histogram is a set of adjacent rectangles whose areas are proportional to the frequencies of a given continuous frequency distribution Mean The mean value of a variable is defined as the sum of all the values of the variable divided by the number of values.
Median The median of a set of data values is the middle value of the data set when it has been arranged in ascending order. So why wait? Solving CBSE Previous Papers for Class Class 10 Maths will help candidates to memorize the concepts properly which will further help to enhance the problem-solving speed. If you have any queries, just leave your comments below and we will get back to you as soon as possible.
Helps to understand the section-wise distribution of marks. This in turn, helps you work on your time management skills and further helps to improve the same. By solving CBSE previous year question papers one can build the solving strategy that is while practising one will come to know more time-consuming section and less time-consuming section.
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