Conduct a survey of at least 50 families in your village/city. take the data of the number of persons in a family, their ages, their educational qualification and income per family. prepare a project report concerning the following points:
(i) prepare age-wise grouped frequency distribution table.
(ii) literacy level in the village/city - elementary, secondary, senior secondary, graduation and higher level and represent it in a pie-chart.
(iii) standard deviation (sd) of the income of the families.
(iv)represent the data in part (ii) with the of bar graph also.