In the class intervales 10-20, 20-30, the number is 20 is included in

In the class intervals 10-20, 20-30, the number 20 is included in.

(i)Find the class mark of the class 90-120. (ii)In a frequency distribution, the mid-value of the class is 10 and width of the class is 6. Find the lowe limit of the class. (iii)The width of each of the five continuous classes in a frequency distribution is 5 and lowe class limit of the lowest class is 10. What is the upper class limit of the highest class? (iv) The class marks of a frequency distribution are 15,20,25...... Find the class corresponding to the class mark 20. (v)In the class intervals 10-20, 20-30, find the class in which 20 is included.

In the class intervals 10-20, 20-30, 20 is taken in the interval 10-20 (b) the interval 20-30 both intervals 10-20, 20-30 (d) none of the intervals

In the class interval 20 - 30, the lower class limit is _______

The width of the class interval 20- 30 is

The median of 100 observations grouped in classes of equal width is 25. If the median class interval is 20-30 and the number of observations less than 20 is 45, then the frequency of median class is

The median of 100 observations grouped in classes of equal width is 25. If the median class interval is 20-30 and the number of observations less than 20 is 45, then the frequency of median class is

If the classes are 0 -10 , 10-20, 20-30…., then in which class should the observation 10 be included ?

If the classes are 0-10, 10-20,20-30… then in which class should the observation 10 be inclused?