Business Statistics question, Management Department, hons 3rd year exam 2020

National University Bangladesh 

Business Statistics question

Hons 3rd year exam 2020


Management Department

Subject Code: 232603


Subject: Business Statistics



Answer any ten questions:   1 × 10 = 10


a) What is pie-chart?


And: A Pie-chart is formed by making off a portion of the pie corresponding to each characteristic being displayed.


b) What is primary data?


Aus: Primary data that have been collected from the origin of the fields is called primary data.


c) What is arithmetic mean?


Ans: An Arithmetic Mean is a numerical value obtained by dividing the sum of values of all the observations by the total number of observations.


২০২০ সালের অনার্স ৩য় বর্ষ পরীক্ষার ব্যবস্থাপনা বিভাগের বাংলাদেশের করবিধি (Taxation in Bangladesh) প্রশ্ন


d) Calculate range of the followings: 2,3,4,-2-4.

Ans: Range=Highest value-Lowest value

= 4-(-2)

= 4+2

= 6


e) How many types of skewness?


Ans: Skewness is of two types as:

i) Positive Skewness,

ii) Negative Skewness


f) What is rank correlation?


Ans: The Co-efficient of correlation between two sets of rank is called rank correlation.


২০২০ সালের অনার্স ৩য় বর্ষের ব্যবস্থাপনা বিভাগের সাংগঠনিক আচরণ (Organizational Behavior ) প্রশ্ন


g) Define standard deviation.


Ans: The standard deviation is the positive square root of the mean of the squared deviations from their mean of a set of value.


h) What is time series?


Ans: When data are arranged in against of time, it is called the time series. Ans: The simplest device for studying correlation in two variables is a special type of at chart


i) What is scatter diagram?




j) What is histogram?


Ans: Histogram is a Suitable graph for representing the frequency distribution of a continuous


২০২০ সালের অনার্স ৩য় বর্ষের ব্যবস্থাপনা বিভাগের কোম্পানি আইন (Company Law ) প্রশ্ন


k) Define null hypothesis.

Ans: The hypothesis about a Population Parameter we wish to test is called a null hypothesis.


l) What is critical value?

Ans: The value of the standard statistic (Z or t) beyond which we reject the null hypothesis





Answer any five questions: 4 × 5 = 20


2. What is the role of statistics in managerial decision making?


3. Show the difference between primary data and secondary data.


4. Distinguish between price index and cost of living index.


২০২০ সালের অনার্স ৩য় বর্ষের ব্যবস্থাপনা বিভাগের বিমা ও ঝুঁকি ব্যবস্থাপনা (Insurance and Risk Management) প্রশ্ন


5. The average marks of 39 students of a class are 50. The marks obtained by 40th student are 39 more than the average marks of all the 40 students. Find the mean marks of all the 40 students.


6. What are the properties of a good measure of dispersion?


7. From the following data, calculate trend values using 3-yearly moving average:

Year 1981 1982 1983 1984 1985 1986 1987
Production 412 438 446 454 470 483 490


8.  From the following data calculate mean deviation


16, 20, 22, 19, 18, 20, 30, 18, 20, 22


9. Five cards are drawn from a packet of well-shuffed cards. Find the probability that 4 cards are aces.




Answer any five questions: 10 × 5 = 50


10. Calculate the mode from the following data:


২০২০ সালের অনার্স ৩য় বর্ষের ব্যবস্থাপনা বিভাগের বাজারজাতকরণ ব্যবস্থাপনা (Marketing Management) প্রশ্ন

11. Find out skewness of the following data and comment on the results:


12. Define dispersion. Discuss the different measures of dispersion.


13. Find out the co-efficient of correlation of the following data and comment on the result:


X (Income) 50 720 202 130 140 182
Y (Expense) 32 378 105 86 84 72


14.Fit a trend line by the method of least squares to the following data:

Year 2013 2014 2015 2016 2017 2018 2019 2020
Sales 38 40 65 72 69 60 87 95

Plot the given data on a graph paper. Showing also the trend line, estimate the sales for year 2021.


Hons 4th year Management department book list- Nu/অনার্স ৪র্থ বর্ষের ব্যবস্থাপনা বিভাগের বইয়ের তালিকা


15. Compute Fisher’s Index Number from the following data and verify the time reversal test and factor reversal test:

Items 2020 2021
Price Quantity Price Quantity
A 10 12 12 15
B 7 15 5 20
C 5 24 9 20
D 16 5 14 5


16. Three unbiased coins are thrown at a time, construct a sample space. What is the probability of getting

(i) At best two heads;

(ii) At least two heads.


মাস্টার্স(MBA) ব্যবস্থাপনা বিভাগের বইয়ের তালিকা/Masters Management department book list-Nu


17. Calculate the skewness and curtosis from the following information and comment on the result: