Statistics is branch of

'Number of absentees in each day in your class for a month' form

Class mark = 

The range of the following frequency distribution is
2.7,2.7,2.8,2.1,2.4,3.2,2.1,3.1,2.8,3.2.

Class mark of a class interval 15 - 25 is:

The position average is

For what value of x, is the mode of the following data 9?
5,8,9,3,9,8,7,6,8,9,x,4

If the mean of 10 observations is 15, then their algebraic sum is

A student got respectively 85,87 and 83 marks in Mathematics, Physics, and Chemistry. The mean of his mark is

The mean 1,2,3,4,5x is 

Find the mean of first six odd numbers.

The number of children in 10 families of a locality are: 2,4,3,4,2,0,3,5,1,6. Find the mean number of children per family.

Mean of 15 observation is 23. If each observation is multiplied by 2, find new mean.

For the given data: 11,15, 17, y+1, 19, y-2, 3; if the mean is 14, find the value of y.

Find the mode of the numbers: 14,14,15,27,26,27,27,22,13

Find the median of the following data 15,28,72,56,44,32,31,43 and 51. If 32 is replaced by 23, find the new median.

10 numbers 8,11,15,19,x+1,2x-13,28,31,40,41 are written in ascending order. If the median is 24, find x.

The median of observations 11,12,14,18,x+2,x+4,30,32,35 and 41 arranged in ascending order is 24. Find x.

Find the mode and median of the following data: 15,3,7,27,17,5,14,8,9,12,24,27,7,27,30

The class marks of a distribution are 37, 42, 47, 52, 57. Determine the class size and the class limits of one last class mark.

Give five examples of data that you can collect from your day-to-day life.

The mean of monthly salary of 12 employees of a firm is Rs.14,500. If one more person joins the firm who gets Rs.18,400 per month, than what will the mean monthly salary now.

A survey conducted by an organisation for the cause of illness and death among the women between the ages 15 - 44 (in years) worldwide, found the following figures (in %):

(i) Represent the information given above graphically.
(ii) Which condition is the major cause of women's ill health and death worldwide?
(iii) Try to find out, with the help of your teacher, any two factors which play a major role in the cause in (ii) above being the major cause.

The % of marks obtained by students in the annual examination of a class in mathematics are given below:

(i) How many students get less than 30% of marks?
(ii) Represent the data by histogram.
(iii) Which value is depicted by a student Ram obtaining the highest marks in the interval 45-50?