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Ignou question papers 2020 -2021 | Important Questions || IGNOU Previous Year Question Paper | IGNOU announces the term-end exam date sheet before the IGNOU exam.
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Here we are providing Previous Years solved papers For B.com First year ECO 07: Element of Statistics for IGNOU students.
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February, 2021
ECO-07: ELEMENTS OF STATISTICS
Section A
Q1. Fill in the blanks with appropriate words as given in the brackets:
(a) _________ statistics refers to those methods which are helpful in drawing inference about the characteristics of the population of sample data. (Descriptive/Inferential)
(b) _________ sampling method is an example of probability sample. (Stratified/Quota)
(c) When errors tend to nullify each other, they are called ________ errors. (Biased/Unbiased)
(d) __________ is a method of data collection in case where informants are illiterate.
(Schedule/Questionnaire)
(e) __________ is a measure of trend and cyclic variations. (Average/Moving average)
Q2. State whether the statements given below are true or false:
(a) When Q1 = 60; Q3 = 96; and median = 80, the coefficient of skewness is – 0.11.
(b) Standard deviation is the root mean of deviation about arithmetic mean.
(c) Harmonic mean is the best measure of rates and speed in all situations.
(d) Determination of the value of mode could be possible through ogives.
(e) A discrete variable carries a fractional value.
SECTION B
Attempt any two questions from this section.
Q3. (a) Following is the distribution of marks obtained by 50 students in Accountancy. Calculate the median marks. Marks No. of Students
|
Marks |
No. of Students |
|
0-10 |
4 |
|
10-20 |
6 |
|
20-30 |
20 |
|
30-40 |
10 |
|
40-50 |
7 |
|
50-60 |
3 |
|
Item of expenditure |
Families (Rs) |
||
|
A |
B |
C |
|
|
Food |
140 |
120 |
150 |
|
Education |
100 |
150 |
130 |
|
Miscellaneous |
300 |
350 |
420 |
|
Profits (In Lakhs.) |
No. of companies |
|
0-10 |
10 |
|
10-20 |
15 |
|
20-30 |
18 |
|
30-40 |
10 |
|
40-50 |
10 |
Q5. (a) How do you make a choice of suitable measure of central tendency?
(b) State the uses of Geometric mean.
SECTION C
Q6. Distinguish between any two of the following:
(a) Primary data and Secondary data
(b) Descriptive and Inferential statistics
(c) Histogram and Histogram
(d) Uni-variate and Bi-variate tables
