14. The cerebrum can receive and recall information. Which of the
following activities are these?
1. Memorize a song
II. Digestion of food
III. Skateboarding on a road
IV. Solve mathematical problem
Aland II Blandt C. I and IV D. II and III
Answers
Answer:
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4. It should be based on all the observations.
5. It should be capable of further algebraic treatment.
6. It should not be unduly affected by extreme observations.
7. It should not be much affected by the fluctuations of sampling.
Various Measures of Average
Various measures of average can be classified into the following three
categories
(a) Mathematical Averages
(i) Arithmetic Mean or Mean
(ii) Geometric Mean
(iii) Harmonic Mean
(iv)Quadratic Mean
(b) Positional Averages
(i) Median
(ii) Mode
(c) Commercial Average
(i) Moving Average
(ii) Progressive Average
(iii) Composite Average
The above measures of central tendency will be discussed in the order
of their popularity. In this lesson, we shall discuss only mathematical and
positional averages.
1.2 ARITHMETIC MEAN
Arithmetic mean is the important, popular and simplest measure of
central tendency. It is generally known as 'Mean' alone. Arithmetic mean or
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