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MEASURES OF CENTRAL TENDENCY ARITHMETIC MEAN
Very short answer questions
1. Define a measure of central tendency.
2. Define arithmetic mean.
3. Name the important measures of central tendency.
4. Define weighted mean.
5. Give one interesting property of arithmetic mean
Short answer questions
1. Calculate arithmetic mean for the following distributions.
4. Neerja obtained the following marks in senior secondary examination of CBSE in 2008. English 80, Hindi 75, Mathematics 93, Physics 86, and Chemistry 85. Find out the weighted mean if weights are 1, 1, 2, 3, and 3 respectively.
NCERT text book questions
Comment whether the following statements are true or false. Give reasons
a) The sum of deviation of items from mean is zero.
b) An average alone is not enough to compare series.
c) Arithmetic mean is a positional value.
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