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  1. 9th
  2. Maths
  3. Statistics
  4. Measures of Central Tendency

Measures of Central Tendency

Statistics
Maths
Class 9

Overview

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Revise with Concepts

Formulae for the Mean

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Mean Compared with Mode and Median

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Related Questions to study

Find the  mean of all the positive factors of  

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The mean of observations is . Find the resulting mean. if each observation is increased by  

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What is the average (arithmetic mean) in degrees of the internal angles in a rectangle? 

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Average weight of 8 boys is 57 kg ,if weight of seven of them are 64, 42, 29, 39, 80, 52 and 55 kgs, then weight of the eighth student is 

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Calculate the arithmetic mean for following data using suitable methods.

Amount

Household

Less than  100

14

Less than 200

22

Less than 300

37

Less than 400

58

Less than 500

67

Less than 600

75

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Mean weight of 25 students of a class is 60 kg. If mean weight of first 13 students is 57 kg and that of last 13 students is 63 kg, then the weight of the 13th students is 

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The value of , where k is is equal to

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A man whose bowling average is , takes wickets for runs and there by decreases his average by . The number of wickets taken by him before his last match is ?

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A batsman has a certain average of runs for 16 innings, In the 17th inning, he makes a score of 85 runs there by increasing the average by 3 What is the average of 17 innings ?

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The average age of 3 friends is 23. Even if the age of the 4th friend is added, the average remains 23. What is the age of the 4th friend?

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