NMIMS Global Access
School for Continuing Education (NGA-SCE)
Course: Business Statistics
Internal Assignment Applicable for April 2017 Examination
Assignment Marks: 30
Instructions:
? All Questions carry equal marks.
? All Questions are compulsory
? All answers to be explained in not more than 1000 words for question 1 and 2 and for
question 3 in not more than 500 words for each subsection. Use relevant examples,
illustrations as far as possible.
? All answers to be written individually. Discussion and group work is not advisable.
? Students are free to refer to any books/reference material/website/internet for attempting
their assignments, but are not allowed to copy the matter as it is from the source of
reference.
? Students should write the assignment in their own words. Copying of assignments from
other students is not allowed
1. Suppose you are the Operations Manager of an e-commerce company. Explain with
examples how you can use descriptive statistics to make better managerial decisions.
(10 Marks)
2. In the “Master Chef 2015” Competition 10 finalists were ranked by three judges in the
following orders:
First Judge : 1, 6, 5, 10, 3, 2, 4, 9, 7, 8
Second Judge : 2, 5, 8, 4, 7, 10, 3, 1, 6, 9
Third Judge : 5, 4, 9, 8, 1, 2, 3, 10, 6, 7
Use the method of rank correlation to determine which pair of judges has the nearest approach in
ranking the competitors. (10 Marks)
NMIMS Global Access
School for Continuing Education (NGA-SCE)
Course: Business Statistics
Internal Assignment Applicable for April 2017 Examination
3. A particular branch of a bank has 30 full-time operating staff that includes branch
manager, assistant managers, loan officers, clerks and security personnel. Because of the
demonetarization issue banks are running 7 days a week and the bank does not have full
complement of staff to handle the increased customer crowd. In addition there are times
when staff are absent as they are getting sick because of the increased stress levels. The
branch manager conducted an audit to determine if there is any kind of strong
relationship between the number of staff absent and the average time that the customer
had to stand in the queues inside the bank. The following was his observation from the
past 10 days information:
a) Develop the linear regression equation that best describes the relationship. What is
the estimate of the time delay per employee absent? (5 Marks)
b) When the bank has full complement of staff, what is the average waiting time in the
queue as predicted by the linear regression? If there are six employees absent, estimate
the average waiting time as predicted by the linear regression? (5 Marks)
***************
No. of staff absent: 1 3 8 0 4 2 3 5 9 7
Avg. waiting Time
(in mins): 5 12 30 6 16 15 20 22 27 24