What is meant by Perfect competitions? State its features.
Concept: Meaning and Features of Market
Name some modern industries which were in operation in our country at the time of independence.
Concept: Introduction to Indian Economy on the Eve of Independence
Mark the following statement as true or false.
Statistics can only deal with quantitative data.
Concept: What is Economics?
Mark the following statement as true or false.
Statistics solve economic problems.
Concept: What is Economics?
Mark the following statement as true or false.
Statistics is of no use to Economics without data.
Concept: What is Economics?
Make a list of activities in a bus stand or a market place. How many of them are economic activities?
Concept: What is Economics?
Frame at least four appropriate multiple-choice options for following question:
Which of the following is the most important when you buy a new dress?
Concept: Collection of Data
Frame at least four appropriate multiple-choice options for following question:
How often do you use computers?
Concept: Collection of Data
Frame at least four appropriate multiple-choice options for the following question:
Which of the following newspapers do you read regularly?
Concept: Collection of Data
Frame at least four appropriate multiple-choice options for the following question:
Rise in the price of petrol is justified.
Concept: Collection of Data
Frame at least four appropriate multiple-choice options for the following question:
What is the monthly income of your family?
Concept: Collection of Data
Frame five two-way questions (with ‘Yes’ or ‘No’).
Concept: Collection of Data
Which average would be suitable in the following case?
Average production in a factory per shift.
Concept: Measures of Central Tendency - Mean
Which average would be suitable in the following case?
The average wage in an industrial concern.
Concept: Measures of Central Tendency - Mean
Which average would be suitable in the following case?
When the sum of absolute deviations from average is least.
Concept: Measures of Central Tendency - Mean
Indicate the most appropriate alternative from the multiple choices provided against the question.
Which average is affected most by the presence of extreme items?
Concept: Measures of Central Tendency - Mean
Indicate the most appropriate alternative from the multiple choices provided against the question.
The algebraic sum of deviation of a set of n values from A.M. is
Concept: Measures of Central Tendency - Mean
Comment whether the following statement is true or false.
The arithmetic mean is a positional value.
Concept: Measures of Central Tendency - Mean
If the arithmetic mean of the data given below is 28, find (a) the missing frequency, and (b) the median of the series:
Profit per retail shop (in Rs) |
0 – 10 |
10 – 20 |
20 – 30 |
30 – 40 |
40 – 50 |
50 – 60 |
Number of retail shops |
12 |
18 |
27 |
– |
17 |
6 |
Concept: Measures of Central Tendency - Mean
Following information pertains to the daily income of 150 families. Calculate the arithmetic mean.
Income (in Rs) |
Number of families |
More than 75 |
150 |
More than 85 |
140 |
More than 95 |
115 |
More than 105 |
95 |
More than 115 |
70 |
More than 125 |
60 |
More than 135 |
40 |
More than 145 |
25 |
Concept: Measures of Central Tendency - Mean