Gujarat Board Class 11 Statistics — Flashcards for Quick Revision

A: Gottfried Achenwall first used the German word 'Statistik' in 1749 for analysis of data about the state. Statistics was formally introduced in Encyclopedia Britannica in 1797.

A: R.A. Fisher is known as the 'Father of Statistics' because he applied statistics to diverse fields like genetics, biometry, psychology, education, and agriculture, and developed modern statistical met

A: P.C. Mahalanobis founded the Indian Statistical Institute (ISI) in 1931 at Calcutta, started the first post-graduate course in Statistics at Calcutta University in 1941, and formulated India's second

A: Classification is the process of arranging ungrouped or raw data into proper systematic and short form. It is necessary because: 1) It represents large data in simple, short and attractive manner, 2)

A: A discrete variable can assume definite or countable values within a specified range. Examples: 1) Number of children per family (0, 1, 2, 3...), 2) Number of accidents on road (counted values). If yo

A: A continuous variable can assume any value within a specified range. Examples: 1) Height of a person (measured in cm, inches), 2) Maximum temperature on a day (measured in celsius). If you have to MEA

A: A measure of central tendency is a single value that represents the center or typical value of a dataset. It is important because it: (1) Presents data in a concise form, (2) Shows special characteris

A: An ideal average should be: (1) Well defined and rigid, (2) Easy to understand and calculate, (3) Based on all observations, (4) Suitable for algebraic operations, (5) A stable measure across samples,

A: Arithmetic mean is the sum of all observations divided by the total number of observations. Formula: x̄ = Σx/n, where Σx is the sum of all observations and n is the number of observations.