Data And Their Representations

Statistics has two distinct meanings

Statistics has two distinct meanings: (1) Plural sense - refers to numerical data itself (like 'Educational Statistics of India'), and (2) Singular se

Primary data is collected directly by

Primary data is collected directly by the investigator for their specific purpose (like conducting a survey), while secondary data is obtained from ex

These tables organize data by showing

These tables organize data by showing how often each value appears. For ungrouped data, we list each distinct value with its frequency. For grouped da

A class interval like 20

A class interval like 20-30 has: lower limit (20), upper limit (30), class width (10), and class mark (25). For continuous data, we convert to true cl

Cumulative frequency of a class equals

Cumulative frequency of a class equals the frequency of that class plus all frequencies of preceding classes. It shows how many observations fall belo