Business Statistics Question Paper of 3rd Semester BBA Download Previous Years Question Paper 9

Roll No.

Total No. of Questions : 07

BBA (Sem.–3rd)

BUSINESS STATISTICS

Subject Code : BB-304

Paper ID : [C0216]

Time : 3 Hrs.

INSTRUCTION TO CANDIDATES :

1. Section –A, is Compulsory.

2. Attempt any four questions from Section-B.

Section –A

l. Write briefly :

a) State and Prove Additive law of probability.

b) Discuss the properties of coefficient of correlation.

c) Distinguish between Geometric and Harmonic mean.

d) Why standard deviation is considered to be the best in comparison

with other measures?

e) State the empirical relation between mean, median and mode.

f) What do you understand by Poisson distribution? What are its properties?

g) Write a note on mean deviation. How it is different from quartile

deviation?

h) State subjective approach to probability.

i) Write a note on independent and dependent events.

j) Differentiate between correlation and regression.

SECTION-B

2. The following table gives the distribution of monthly income of 600

families in a certain city.

Monthly Income                 No. of families

Below 75                                               60

75-150                                          170

150-225                                                 200

225-300                                        60

300-375                                        50

375-450                                        40

450 and more                               20

Draw a 'less than' and a 'more than' ogive curve for the above data on

the same graph and from these find the median income.

3. From the following data calculate mode.

Variable (x) : 0-10   10-20   20-30   30-40   40-50   50-60   60-70

Frequency (f) : 5        6        8           12        15         5                   3

4. In a certain college, the students engage in various sports in the following

proportions.

Football (F)                                  : 60% of all students

Basketball (B)                              : 50% of all students

Both Football and Basketball      : 30% of all students

If a student is selected at random, what is the probability that he will:

i) Play football or basketball

ii) Play neither sports?

5. Write regression equations of x on y and y on x for the following data:

x : 45 48 50 55 65 70 75 72 80 85

y : 25 30 35 30 40 50 45 55 60 65

6. Fit a Poisson distribution to the following data and calculate the theoretical

frequencies.

x : 0   1        2       3       4

y : 123        59      14      3        1

7. Calculate mean and standard deviation of the following data:

Value : 90-99   80-89   70-79   60-69   50-59   40-49   30-39

Frequency : 2     12        22         20        14         4            1