Q2 of 48 Page 125

Find the median of the observations, 59, 75, 68, 70, 74, 75, 80.

Given: 59, 75, 68, 70, 74, 75, 80.


Here, n =7


On arranging the data in ascending order,


59, 68, 70, 74, 75, 75, 80


When the number of terms of odd, the median is given as:



⇒ Median =


⇒ Median = 4th term


∴ Median =74


More from this chapter

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4

Using the data in example (3) above, prepare less than type cumulative frequency table and answer the following questions.

i. How many students obtained less than 40 marks?


ii. How many students obtained less than 10 marks?


iii. How many students obtained less than 60 marks?


iv. Find the cumulative frequency of the class 50-60.

 1

Yield of soyabean per acre in quintal in Mukund's field for 7 years was 10, 7, 5, 3, 9, 6, 9. Find the mean of yield per acre.

 3

The marks (out of 100) obtained by 7 students in Mathematics' examination are given below. Find the mode for these marks.

99, 100, 95, 100, 100, 60, 90

 4

The monthly salaries in rupees of 30 workers in a factory are given below.

5000, 7000, 3000, 4000, 4000, 3000, 3000, 3000, 8000, 4000,


4000, 9000, 3000, 5000, 5000, 4000, 4000, 3000, 5000, 5000,


6000, 8000, 3000, 3000, 6000, 7000, 7000, 6000, 6000, 4000


From the above data find the mean of monthly salary.