Commerce (English Medium) Class 11 - CBSE Question Bank Solutions for Economics

To check the quality of two brands of lightbulbs, their life in burning hours was estimated as under for 100 bulbs of each brand.

Which brand is more dependable?

Use the data in the Table below that relate to monthly household expenditure (in Rs) on the food of 50 households and

In a city, 45 families were surveyed for the number of Cell phones they used. Prepare a frequency array based on their replies as recorded below.

"The quick brown fox jumps over the lazy dog"
Examine the above sentence carefully and note the numbers of letters in each word. Treating the number of letters as a variable, prepare a frequency array for this data.

Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data:

Use the data in the Table below that relate to monthly household expenditure (in Rs) on the food of 50 households and

Monthly Household Expenditure (in Rupees) on Food of 50 Households

Divide the range into an appropriate number of class intervals and obtain the frequency distribution of expenditure.

Bar diagram is a ______ 

Data represented through a histogram can help in finding graphically the ______ 

The width of bars in a bar diagram need not be equal.

What kinds of diagrams are more effective in representing the following?

Monthly rainfall in a year

What kinds of diagrams are more effective in representing the following?

Composition of the population of Delhi by religion

What kinds of diagrams are more effective in representing the following?

Components of cost in a factory

The Indian Sugar Mills Association reported that ‘Sugar production during the first fortnight of December 2001 was about 3,87,000 tonnes, as against 3,78,000 tonnes during the same fortnight last year (2000). The off-take of sugar from factories during the first fortnight of December 2001 was 2,83,000 tonnes for internal consumption and 41,000 tonnes for exports as against 1,54,000 tonnes for internal consumption and nil for exports during the same fortnight last season.’

Present the data in tabular form.

The unit of the correlation coefficient between height in feet and weight in kgs is ______

The range of simple correlation coefficient is ______ 

Why is r preferred to covariance as a measure of association?