# B.Com 1st Year Business Statistics Mock – I Papers

B.Com 1st Year Business Statistics Mock – I Papers :- Notes Study material Unit Wise Chapter Wise Topic Wise division of the content. Question Answer Study Material Notes Examination Paper Sample Model Paper Previous Year Paper PDF Download This Post is very useful for all the Student B.A., B.Sc., B.Com., M.A., M.Com.

### Section-A

Note : –This Section contains one question of ten parts requiring short answers. Each part carries 4 marks.

(4×10=40) _.

(i) Explain the importance of statistics in trade and commerce.

(ii) What are the different methods of finding correlation?

(iii) What do you mean by distrust of statistics?

(iv) Find out the standard deviation from the following:

N=10, EX = 60, EX2 = 1,000.

(v) Machine is depreciated by 40% in the first year, by 25% in the second year and by 10% per annum for next three years. Each percentage is calculated on the diminishing value. What is average rate of depreciation?

(vi) In a frequency distribution, Karl Pearson’s coefficient of skewness is +0.4, standard deviation is 6.5 and mean is 29.6. Find the mode.

(vii) What are the different causes of correlation? Discuss its types.

(viii) Write a short note on fitting of parabola in least square method.

(ix) Describe the organisation and functions of C.S.O. in India.

(x) The average rainfall for a week, excluding Sunday was 10 cm. Due to heavy rainfall on Sunday, the average for the week rose to 15 cm. How much rainfall was there on Sunday?

## Section-B, C, D & E

Note : Each section contains two questions. Attempt one question from each section. Each question carries 15 marks. Answer must be descriptive.

(15×4=60)

## Section – B

1. What do you mean by dispersion? How is it measured? Distinguish clearly between dispersion and skewness.
2. Calculate mode from the following data:

 Class Interval 0-9 10-19 20-29 30-39 40-59 60-79 80-99 Frequency 32 36 20 30 48 24 2

## Section – C

1. Distinguish between primary and secondary data and discuss the various methods of collecting primary data and point out their merits and demerits.
2. (i) Convert the following into continuous series and then prepare ‘less than’ cumulative Servies:
 Marks (Mid value) 5 15 25 35 45 55 No of students 8 12 15 9 4 2

(ii) Write a note on correlation in time series.

## Section – D

1. What are the different methods of measuring seasonal variations? Explain in detail.
2. Discuss the relative merits and demerits of mean. median and mode measures of Central tendency. Which of the measures do you consider as most satisfactory and why?

## Section – E

1. Calculate mean and standard deviation of the following data:
 Size 6 7 8 9 10 11 12 Frequency 3 6 9 13 8 5 4

Find out missing frequencies in the following incomplete distribution:

 C.I 0-10 10-20 20-30 30-40 40-50 F 3 7 20 12 ?

The value of median and mode are 27 and 26 respectively.