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ASSIGNMENT
Q1 DistinguishbetweenClassificationandTabulation. Explain the structure and components of
a Table with an example.
 Meaning of Classification and Tabulation
 Differences between Classification and Tabulation
 Structure and Components of a Table with an example
Answer.
Meaning of Classification and Tabulation
Classification
According to Secrist, “Classification is the process of arranging data into sequences and groups
according to their common characteristics or separating them into different but related parts”.
According to Stockton and Clark, “The process of grouping large number of individual facts and
observations, on the basis of similarity -------------
DRIVE SPRING 2015
PROGRAM MBA
SEMESTER 1
SUBJECT CODE & NAME MB0040 STATISTICS FOR MANAGEMENT
BK ID B1731
CREDIT & MARKS 4 Credits,60 marks
Name XXXXX

2. Q2. (a) Explain Arithmetic mean.
(b) The mean wage is Rs. 75 per day, SD wage is Rs. 5 per day for a group of 1000 workers and
the same is Rs. 60 and Rs. 4.5 for the other group of 1500 workers. Find the mean and standard
deviation for the entire group. 7
Answer:
(a) Arithmeticmean: Arithmeticmeanisdefinedasthe sumof all valuesdividedbynumber
of values and is represented by X . Arithmetic mean is also called ‘average’. It is most
commonlyused measures of central tendency. Arithmetic Mean of a series is the value
obtained by adding all the observations of a series and --------------------
Q3. Mr. Arun and Mr. Bhandari play a game. If Mr. Arun picks up an even number from 1 to 6,
Mr. Bhandari will pay him double the amount equal to picked up number. If Mr. Arun picks up
an odd number then he has to pay amount equal to double the picked up number. What is Mr.
Arun’s expectation? 10
Solution:Let Xi be the randomvariable andP(Xi) be itsprobability.The probabilities are indicated
in table.
Required Values for Calculating Mean and Variance for the Data
NO. (Xi) P(Xi) Xi P(Xi)
1 -2 1/6 - 2/6
2 4 1/6 4/6
Q4. The probability that an employee will get an occupational disease is 20%. In a firm having
five employees, what is the probability that:
i) None of the employees get the disease 4
ii) Exactly two will get the disease 3
iii) More than four will contract the disease 3
Answer: Solution
Given that:
0.2

3. Q5. Microsoft estimated that out of 10,000 potential software buyers, 35% wait to purchase
the new OS Windows Vista, until an upgrade has been released. After an advertising campaign
to reassure the public was released, Microsoft surveyed 3000 buyers and found 950 who are
still skeptical. At 5% level of significance, can the company conclude that the population of
skeptical people had decreased? 10
Answer: Solution:
The procedure is explained in the following steps:
1. Null hypothesis Ho: p = .35-------
Q6. Explain Chi-square test and the conditions for applying chi-square test. (Meaning,
Conditions) 5, 5
Answer: Chi-Square test:The Chi-square testisone of the most commonly used non-parametric
tests 2 describe the
is calculated as:
Where, O1, O2, O3….On are the observed frequencies and E1, E2, E3…En are the corresponding
expected or theoretical frequencies----------------
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