RBSE Class 8 Maths Notes Chapter 5 Data Handling

These comprehensive RBSE Class 8 Maths Notes Chapter 5 Data Handling will give a brief overview of all the concepts.

RBSE Class 8 Maths Chapter 5 Notes Data Handling

→ Data: The information collected is called data.

→ Data mostly available to us in unorganised form is called raw data.

→ Frequency gives the number of times that a particular entry occurs.

→ When the number of observations is large, the data is usually organised into groups called class intervals.

→ Table showing the frequencies of various class intervals is called a frequency distribution table.

→ Data in the class intervals is called a grouped data.

→ Histogram: It is a type of bar diagram, where the class intervals are shown on the horizontal axis and the heights of the bars show the frequency of die class interval.

→ Pie Charts: In a pie chart, the value of different components are represented by sectors of a circle. The total angle of 360° at the centre of a circle is divided according to the values of the components.

→ Central angle for a component = \(\left(\frac{\text { Value of the component }}{\text { Total Value }} \times 360\right)^{\circ}\)

→ There are certain experiments whose outcomes have an equal change of occurring. A random experiment is one whose outcomes cannot be predicted exactly in advance.

→ Outcomes of an experiment are equally likely if each has the same chance of occurring.

→ Probability of an event = \(\frac{\text { Number of outcomes that make an event }}{\text { Total number of outcomes of the experiment }}\)

→ One or more outcomes of an experiment make an event.

→ Each of the groups 0-10, 10-20, 20-30, etc., is called class interval.

→ Class limits: Let us consider the class 10-20, Here 10 is the lower class limit and 20 is the upper class limit.