NMIMS Global Access
School for Continuing Education
(NGA-SCE)
Course: Business Statistics
Internal Assignment Applicable for September 2020
Examination
Assignment Marks: 30
1.
The sales figures of two firms (in million Rs.) calculated over a period of
time are as
follows:
|
Firm A |
120 |
100 |
110 |
80 |
90 |
70 |
50 |
60 |
40 |
|
Firm B |
50 |
40 |
60 |
90 |
80 |
70 |
110 |
100 |
120 |
a.
Find mean and standard deviation of both the firms and interpret the same.
b.
Which firm has better performance? How do you analyze the performance in this
case?
c.
If you need to invest in a firm then which firm would you choose and why?
(10
Marks)
2.
The Manager wants to fix income of employees for production department. The past
data
on 8 incomes with the experience is shown below
|
Experience (in years) |
10 |
12 |
6 |
7 |
10 |
8 |
1 |
5 |
|
Income (in thousands) |
25 |
28 |
17 |
18 |
24 |
21 |
10 |
16 |
a. Find the correlation between the experience
and income.
b. Determine the coefficient of determination and interpret it.
c. Estimate the monthly salary for a person having 14 years of
experience by assuming
the linear relation between the two variables.
(10 Marks)
3. The weekly demand of a cell phone shop is following the normal
distribution with
average number of cell phones sold is 200 units and it has also
been found that 90% of
time the demand is lying less than 220 units.
a. Using this information find the standard deviation of the
distribution.
(5 Marks)
b. Determine the lowest stock that the company should maintain so
that the probability of
shortage is not higher than 5%. (5 Marks)
**********
No comments:
Post a Comment