Histograms

Represent the following data by Histogram:

The following histogram shows the monthly wages (in Rs) of workers in a factory:

(i) In which wage-group the largest number of workers are being kept? What is their number?
(ii)  What wages are the least number of workers getting? What is the number of such workers?
(iii) What is the total number of workers?
(iv) What is the factory size?

The following is the frequency distribution of waiting time at ATM centre; draw histogram to represent the data:

Construct a frequency polygon without using a histogram for the following frequency distribution :

Observe the following frequency polygon and write the answers of the questions below it.

1. Which class has the maximum number of students?
2. Write the classes having zero frequency.
3. What is the class-mark of the class, having frequency of 50 students?
4. Write the lower and upper class limits of the class whose class mark is 85.
5. How many students are in the class 80-90?

(Use a graph paper for this question.) The daily pocket expenses of 200 students in a school are given below:

Draw a histogram representing the above distribution and estimate the mode from the graph.

The weekly wages (in Rs) of 30 workers in a factory are.

830, 835, 890, 810, 835, 836, 869, 845, 898, 890, 820, 860, 832, 833, 855, 845, 804, 808, 812, 840, 885, 835, 835, 836, 878, 840, 868, 890, 806, 840

Using tally marks make a frequency table with intervals as 800 − 810, 810 − 820 and so on.

The number of hours for which students of a particular class watched television during holidays is shown through the given graph.

Answer the following

1) For how many hours did the maximum number of students watch TV?

2) How many students watched TV for less than 4 hours?

3) How many students spent more than 5 hours in watching TV?