CBSE Guess > Papers > Important Questions > Class XI > 2011 > Economics > Economics By Mr. Mohammed Aslam
CBSE CLASS XI
Time: 3 Hrs (Maximum Marks: 100)
General Instruction:
- All questions in both the sections are compulsory.
- Marks for questions are indicated against each.
- Question Nos. 1-5 and 17-21 are very short-answer questions carrying 1 mark each. They are required to be answered in one sentence each.
- Question Nos. 6-10 and 22-26 are short-answer questions carrying 3 marks each. Answer to them should not normally exceed 60 words each.
- Question Nos. 11-13 and 27-29 are also short-answer questions carrying 4 marks each. Answer to them should not normally exceed 70 words each.
- Question Nos. 14-16 and 30-32 are long-answer questions carrying 6 marks each. Answer to them should not normally exceed 100 words each.
- Answer should be brief and to the point and the above word limit be adhered to as far as possible.
Statistics For Economics(Questions with Answers)
- What is a random sample? (1 Marks)
- What is a Lorenz curve? (1 Marks)
- Define statistical series. (1 Marks)
- What is an index number? (1 Marks)
- What is a first step of a project? (1 Marks)
- “Statistics is both science as well as an art” Discuss The statement? (3 Marks)
- Define mode. How is it compute? (3 Marks)
- Write down the various measures of dispersion. (3 Marks)
- Compute the cost living index number using, aggregate expenditure method of the Following information (3 Marks)
Commodities
Q0
P0
P1
Whet
20
10
12
Rise
5
30
35
Ghee
2
20
30
sugar
4
25
40
OR Write note on:
a) SENSEX
b) NIFTY
- Calculate median from the following data set. (3 Marks)
Mark in Hindi
0-10
10-20
20-30
30-40
40-50
50-60
60-70
70-80
No. of students
5
15
18
12
20
15
7
3
- What are the qualities of a good questionnaire? (4 Marks)
- Describe structure of project report. (4 Marks)
- Calculate mean and standard deviation from the following series. (4 Marks)
Mark in Hindi
20-30
30-40
40-50
50-60
60-70
70-80
No. of students
5
15
0
22
11
7
OR Discuss the kinds and degrees of correlation?
- Draw a histogram for the following data and also draw the frequency curve on it. (6 Marks)
Monthly income
No. of families
0-75
15
75-150
90
150-225
140
225-300
70
300-375
35
- A student subject 40 mark in English,65 in Hindi,53 in maths,49 in economics and 55 in statistics. Calculate weighted mean of the marks if weights are respectively 2, 1, 5, 5, and 3. Or Mention merits and demerits of Mean. And list out any three examples of ‘scope of averages in your class room’. (6 Marks)
- Following are the marks obtained by 10 students in two subjects, statistics and economics, calculate Spearman's rank correlation. (6 Marks)
Mark in statistics
20
25
30
45
31
48
21
10
26
34
Mark in Economics
5
19
20
42
21
47
20
10
12
33
Answers:-
- Its each and every unit of population has an equal chance of being selected. (1 Marks)
- Lorenz curve is a graphic method of measuring dispersions from the average. (1 Marks)
- Defined as things or attributes of things arranged according to some logical order. (1 Marks)
- Index number is a specialized averages designed to measure the changes in group of related variables over period of time.(1 Marks)
- Identification of problem.(1 Marks)
- Statistics is the numerical statement of facts---- science Statistics evaluating social problems---- arts 1½ +1½ = (3 Marks)
- The mode is that value in a series of observations which occurs with the greatest frequency. (1 Marks)
Compute mode
- Individual series-which occurs maximum number items (repeated)
- Discrete series- value of greatest frequency
- ontinues series –using the formula
- Or explain with example give the mark 2 (1+2=3 Marks)
- Measures of dispersion.
- Range
- Quartile deviation
- Mean deviation
- Standard deviation
- Lorenz curve
- Any three 1x3=(3 Marks)
Commodities
Q0
P0
P1
p0qo
p1q0
Whet
20
10
12
200
240
Rise
5
30
35
150
175
Ghee
2
20
30
40
60
sugar
4
25
40
100
160
490
635
Aggregate expenditure method =
=129.59 Inflation 29.59% 1+1+1 = (3 Marks)
Sensex
- Index of Bombay stock exchange
- Total 30 shares
- resent index above 20000
Nifty
- Index of national stock exchange
- Total 50 shares
- Present index above 5000 1½ +1½ = (3 Marks)
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Mark in Hindi
No. of students
cf
0-10
5
5
10-20
15
20
20-30
18
38
30-40
12
50
40-50
20
70
50-60
15
85
60-70
7
92
70-80
3
95
95
1+1+1 =(3 Marks)
- Proper order of questions.
- Proper question number
- void unnecessary questions.
- imple and short questions.
- Any relevant answers. 1x4=(4 Marks)
- Introduction
- Statement of the problem
- Objectives
- Methodology
- Analysis of data
- Limitation of the study
- Conclusions. (4 Marks)
Mark in Hindi
No. of students
M
MF
d
fd
d²
fd²
20-30
5
25
125
-37
-185
1369
6845
30-40
15
35
525
-27
-405
729
10935
40-50
0
45
0
-17
0
289
0
50-60
22
55
1210
-7
-154
49
1078
60-70
11
65
715
3
33
9
99
70-80
7
75
525
13
91
169
1183
60
3100
-620
20140
2+1+1 =(3 Marks)
Or
Kinds of correlation
- Positive and negative correlation
- Linier and non-linier correlation
- Simple, partial and multiple correlation
Degrees of correlation 2 + 2 = (4 Marks)
Perfect correlation
1 (+ve or –ve )
Higher correlation
99 to 75 (+ve or –ve )
Moderate correlation
74 to 25 (+ve or –ve )
Lower correlation
25 to 01 (+ve or –ve )
No correlation
0
- ∑wx÷∑w
= 820÷16
= 51.25
Or Merit
a. Simplicity
b. Stability
c. Accuracy test
d. Any relevant answers.(ex)
Demerits
a. Unsuitability
b. Misleading conclusions
c. Effect of extreme items
d. Any relevant answers.(ex)
Scope of averages in class room
a. we can find average mark
b. it help formulation of policies
c. Find out average age, weight, height..Etc
d. Any relevant answers.(ex) (any three) 2+2+2 =( 6 Marks)
Mark in statistics
Mark in Economics
Rank in statistics
Rank in Economics
D
D²
20
5
9
10
1
1
25
19
7
7
0
0
30
20
5
5.5
0.5
0.25
45
42
2
2
0
0
31
21
4
4
0
0
48
47
1
1
0
0
21
20
8
5.5
2.5
6.25
10
10
10
9
1
1
26
12
6
8
2
4
34
33
3
3
0
0
12.5
=
Positively high correlation
Submitted By Mr. Mohammed Aslam
Email Id :[email protected]
About Yourself : Now working GCSE Economics international teacher
