Viva Voce: Draw Histograms for Classes of Equal Widths and Varying Widths | Lab Manuals for Class 9

Q.1. What do you mean by data?

The facts or figures which are numerical or otherwise collected with a definite purpose are called data.

Q.2. How will you define a secondary data?

When the information was gathered from a source which already had the information stored, the data obtained is called secondary data.

Q.3. How will you define a histogram?

A histogram is the graphical representation of a grouped frequency distribution with continuous classes in the form of rectangles with class intervals as bases and the corresponding frequencies as heights.

Q.4. What do you understand by grouped data?

Grouped data is a statistical term used in a data analysis. A raw data set can be organised by constructing a table showing the frequency distribution of the variable {whose values are given in the raw data). Such a frequency table is often reffered to as grouped data.

Q.5. How will you define the statistics?

Statistics deals with the collection, organisation, analysis and interpretation of data.

Q.6. What do you understand by a primary data?

When the information was collected by the investigator herself or himself with a definite objective in her or his mind, the data obtained is called primary data.

Q.7. In what form, data is presented graphically?

Data can be presented graphically in the form of bar graph, histogram and frequency polygons.

Q.8. What is the singular form of data?

Datum