ISS Statistics Paper III: Questions 25 - 32 of 90

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Question number: 25

» Sampling Techniques » Cluster Sampling With SRS - Intra-Class Correlation Coefficient

Appeared in Year: 2009

Short Answer Question▾

Write in Short

Explain cluster sampling.

Question number: 26

» Applied Statistics » Time Series Analysis » Economic Time Series & Components

Appeared in Year: 2009

Short Answer Question▾

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Describe the Yule -Slutsky effect of moving average operation on the random component of a time series.

Question number: 27

» Sampling Techniques » Two-Stage Sampling With Equal Number of Second Stage Units

Appeared in Year: 2009

Essay Question▾

Describe in Detail

Distinguish between two-stage and two-phase sampling schemes. Give suitable examples.

Explanation

Two Stage Sampling:

All elements are surveyed in cluster sampling and efficiency in cluster sampling depends on size of the cluster. As the size increases, the efficiency decreases.

Rather than enumerating all the sampling units in the selected clusters, one can get better and more efficient estimators by resorting to… (280 more words) …

Question number: 28

» Econometrics » Auto-Correlation

Appeared in Year: 2009

Essay Question▾

Describe in Detail

Define multicollinearity. What are the causes of multicollinearity? How will you detect the same and solve it?

Explanation

Multicollinearity: Implies predictors that are correlated with other predictors in the model. Here two or more predictor variables in a multiple regression model are highly correlated and implies that one can be linearly predicted from the others with a substantial degree of accuracy.

Causes of multicollinearity:

  • Inaccurate use of dummy… (306 more words) …

Question number: 29

» Sampling Techniques » Concepts in Sampling

Appeared in Year: 2010

Essay Question▾

Describe in Detail

What precautions would you take in planning for a sample survey?

Explanation

Precautions to be taken for planning sample survey:

  1. Objectives of the survey: The first step is to define clearly the objective of the survey. The objective should be kept easy so that the people working for the survey easily understand it. The hypothesis being tested and the outcomes that will… (664 more words) …

Question number: 30

» Econometrics » Autoregressive Linear Regression

Appeared in Year: 2011

Essay Question▾

Describe in Detail

Discuss second order autoregressive series. For this series, obtain complementary function (CF) only.

Explanation

Second order autoregressive series:

Sometimes, the values of a time series data are highly correlated with the values that precede and succeed them. i. e. , The value of a time series at any time “t” may depend upon its own value at times t-1, t-2, …, t-k, the relationship… (149 more words) …

Question number: 31

» Sampling Techniques » Simple Random Sampling and Systematic Sampling

Appeared in Year: 2010

Short Answer Question▾

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A hypothetical population has the population units in linear trend given by Equation = a Equation (i = 1, 2, … N).

Show that: V ( Equation

V ( Equation where N = nk

V ( Equation Equation

Hence, deduce that Equation

Question number: 32

» Applied Statistics » Index Numbers » Price Relatives and Quantity or Volume Relatives

Appeared in Year: 2011

Short Answer Question▾

Write in Short

For the following table:

Commodity

shows given table is commodity

find out the value of given commodity table.

A

B

Equation

1

1

Equation

10

5

Equation

2

x

Equation

5

2

Where p and q stand for price and quantity for 0 and 1 time periods respectively. Find the value of X if the ratio between Laspeyre’s (L) and Paasche’s (P) index number is L: P: : 28: 27

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