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NCERT · Class 11 · Statistics

Chapter 8: Use of Statistical Tools

Practice each question, then open the answer or worked solution.

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Project activities

12 questions
Q11Written answer

You are a Bank Officer and want to survey the saving habits of the people by taking into consideration income and expenditure of the people. Prepare a report.

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Worked solution
GUIDED ANSWER Objective: to study people’s saving habits in relation to their income and expenditure. Target group: a sample of households or account-holders of different income levels. Data: monthly income, monthly expenditure, monthly saving, and the form of saving (bank deposit, post office, gold, etc.). Tools: tabulate income, expenditure and saving; compute the mean saving and the standard deviation; compute the correlation between income and saving (it should be positive); show the forms of saving by a pie diagram. Conclusion: conclude how saving rises with income and which saving instruments are popular, then recommend suitable bank schemes, with a bibliography.
Q12Written answer

Suppose you are part of a group of students who wants to study farming practices and the problems facing farmers in a village. Prepare a project report.

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Worked solution
GUIDED ANSWER Objective: to study the farming practices and the problems faced by farmers in a village. Target group: farmer households of the village (a near-census in a small village). Data: crops grown, area of land, source of irrigation, cost of inputs (seeds, fertiliser, labour), yield, selling price and main problems (water shortage, low price, debt, pests). Tools: tabulate crop-wise area and yield; show crops by a pie diagram and problems by a bar diagram; compute the mean cost and income per acre and the net profit; use correlation between irrigation and yield. Conclusion: identify the biggest problems and recommend solutions (better irrigation, fair prices, crop loans), with a bibliography.