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12th Economics Weekly Test - 2 ( Introduction to Statistical Methods and Econometrics )

St. Britto Hr. Sec. School - Madurai

12th Economics Weekly Test - 2 ( Introduction to Statistical Methods and Econometrics )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Who stated that statistics as a science of estimates and probabilities.

Horace Secrist.
R.A Fisher
Ya-Lun-Chou
Boddington

The term used by Galton is

Correlation
Standard Deviation
Regression
Average

The data collected by questionnaires are_______

Primary data.
Secondary data
Published data.
Grouped data

Which of the statements do not hold true?

Both regression coefficients cannot be greater than 1
Regression coefficients are unaffected by origin shift and scale shift
Both correlation and regression coefficients are of same sign
Two regression lines coincide if r=±1

The Central Statistical Office is one of the two wings of the __________.

NSSO
CSIR
MSOP
NSO

In correlation, there are _______ types based upon the number of variables studied as

one
two
three
four

__________ is coined by Ragnar Frisch.

Statistics
Accountancy
Econometrics
None

Find the negative correlation equation.

Y= a – by
X= a – bx
Y= a + bx
Y= a – bx

_______________ data are original in character.

Primary
Discrete
Raw
Continuous

Given the diagram, find the correct answer.
Degrees of correlation :

all the above are correct
all the above are incorrect
I and II are correct, III and IV are incorrect
I and II are incorrect, III and IV are correct

________ data already exist in some form: published or unpublished in an identifiable secondary source.

primary
vital
raw
secondary

Those data which do not already exist in any form, and thus have to be collected for the first time from the primary source(s).

Secondary data
Vital data
Raw data
Primary data

Find the incorrect equation.
I. Economics + Mathematics= Mathematical Economics
II. Mathematical Economics+ Statistical Data & Its Technique = Econometrics
III. {Economics + Statistics + Mathematics}+Empirical Data = Applied Econometrics

I
III
III and II
II and I

__________ are those that can be quantified in definite units of measurement.

Qualitative data
Raw data
Quantitative data
Refined data

The process of arranging the data into classes and subclasses according to the common characteristics

Tabulation
Classification
Distribution
Arrangement_

Part - B

Generic 5 - Answer All Question

Compute the Pearson r for the same sets of data using the raw score method

X 9, 13, 6, 18, 14, 12, 11, 7, 2, 6, 14, 15, 5, 8,

Y 23, 40, 10, 48, 25, 30, 15, 10, 5, 45, 40, 35, 12, 27

The data on price and quantity purchased relating to a commodity for 5 months is given below: Find the Pearsonian correlation coefficient between prices and quantity and comment on its sign and magnitude.

Month January Febuary March April May

Prices (Rs): 10 10 11 12 12

Quantity (Kg): 5 6 4 3 3

Find out graphically, if there is any correlation between price yield per plot (qtls); denoted by
Y and quantity of fertilizer used (kg); denote by X.

Plot No: 1 2 3 4 5 6 7 8 9 10

Y: 3.5 4.3 5.3 5.8 6.4 7.3 7.2 7.5 7.8 8.3

X: 6 8 9 12 10 15 17 20 18 24

What are the steps taken to calculate S.D?

What are the Steps involved in standard deviation calculation?

Calculate standard deviation from the following data.

X

10

20

30

40

50

60

f

4

6

9

8

5

10

Enumerate the methodology of econometrics?
Calculate the Karl Pearson Correlation Co-efficient for the following data

Demand of Product X 23 27 28 29 30 31 33 35 36 39

Sale of Product Y: 18 22 23 24 25 26 28 29 30 32

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