The following table gives the life times of 400 neon lamps :

(i) Represent the given information with the help of a histogram.

The following table gives the life times of 400 neon lamps : (ii) How many lamps have a life time of more than 700 hours ?

The following table gives the distribution of the life time of 400 neon lamps : Find the median life time of a lamp

The following table gives the life time of 200 bulbs. Calculate the mean life time of a bulb by step deviation method :

The following table gives the life time in days of 100 bulbs: Change the above distribution as frequency distribution.

The following information gives the monthly salaries of 100 employees. Find the mode of the given data.

The following table gives the dally income of 80 workers of a factory. Find mean median and mode for the given data

The following table gives the information of daily income of 50 workers of a factory. Draw a 'less than type ogive' for the given data:

The following distribution gives the distribution of life times of washing machines of a certain company: Convert the above distribution into 'less than type' and draw its ogive.

The following table gives the distribution of students of two sections according to the marks obtained by them : Represent the marks of the students of both the sections on the same graph by two frequency polygons. From the two polygons compare the performance of the two sections.

The following data on the number of girls of the nearesten per thousand boys in different sections of Indian society is given below. (i) Represent the information above by a bar graph.