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14. Statistics
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Q4 of 8 Page 293

Find the mean of the first ten natural numbers?

First, ten natural number is given by


1, 2, 3, 4, 5, 6, 7, 8, 9, and 10


The sum of ‘n' natural numbers is given by


Where n is the number of terms.


And we know that,



Mean of 10 natural number




More from this chapter

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2

The mean of 5 observation is 15. If the mean of the first three observations is 14 and that of the last three is 17. Find the third observation.

3

The average score of boys in an examination of a school is 71 and that of girls is 73. The average score of the school in examination is 71.8. Find the ratio of number of boys to the number of girls that appeared in examination.

5

Find the sum of deviation of all observations of the data 5, 8, 10, 15, 22 from their mean.

6

Show that sum of deviation of the mean from the observations 25 27 19 23 25 31 is zero.

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14. Statistics
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