# Assignment: Normal Distribution and Business Forecasting

**Topics:**Normal distribution, Stratified sampling, Sampling

**Pages:**7 (308 words)

**Published:**February 26, 2014

PROGRAM

SEMESTER

SUBJECT CODE & NAME

BK ID

CREDITS

MARKS

ASSIGNMENT

WINTER 2013

MBADS/ MBAFLEX/ MBAHCSN3/ MBAN2/ PGDBAN2

I

MB0040

STATISTICS FOR MANAGEMENT

B1731

4

60

Note: Answer all questions. Kindly note that answers for 10 marks questions should be approximately of 400 words. Each question is followed by evaluation scheme. Questions

Marks

Total Marks

Q.No

1

Distinguish between Classification and Tabulation. Explain the structure and

components of a Table with an example.

Meaning of Classification and Tabulation

Differences between Classification and Tabulation

2

Structure and Components of a Table with an example

2

2

10

6

a) Describe the characteristics of Normal probability distribution. b) In a sample of 120 workers in a factory, the mean and standard deviation of wages were Rs. 11.35 and Rs.3.03 respectively. Find the percentage of workers getting wages between Rs.9 and Rs.17 in the whole factory assuming that the wages are normally distributed.

Characteristics of Normal probability distribution

Formula/Computation/Solution to the problem

3

4

10

6

a) The procedure of testing hypothesis requires a researcher to adopt several steps. Describe in brief all such steps.

b) Distinguish between:

i. Stratified random sampling and Systematic sampling

ii. Judgement sampling and Convenience sampling

Hypothesis testing procedure

4

Differences

10

6

(3 each)

4

a) What is regression analysis? How does it differ from correlation analysis? b) Calculate Karl Pearson’s coefficient of correlation between X series and Y series. X

110

120

130

120

140

135

155

160

165

155

Y

12

18

20

15

25

30

35

20

25

10

Meaning of Regression and Correlation

Differences

3

Formula/ Computation/ Solution to the problem

5

2

5

Briefly explain the methods and theories of Business forecasting. Meaning of Business forecasting

2

Methods of Business forecasting

4

Theories of Business forecasting

6

10

10

4

Construct Fisher’s Ideal Index for the given information and check whether Fisher’s formula satisfies Time Reversal and Factor Reversal Tests.

Items

P0

Q0

P1

Q1

A

16

5

20

6

B

12

10

18

12

C

14

8

16

10

D

20

6

22

10

E

80

3

90

5

F

40

2

50

5

Formula of Fishers Ideal Index

1

Computation of Fisher’s Ideal Index

3

Fisher’s formula satisfies Time Reversal Test

3

Fisher’s formula satisfies Factor Reversal Test

3

10

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