# Aligarh Muslim University (AMU) 2007 B.B.A BUSINESS STATISTICS - Question Paper

Tuesday, 15 January 2013 02:40Web

**Time :**3 hours

**Maximum :**100 marks

**PART A**— (4 * 10 = 40 marks)

ans any 4 ques..

1. Define median. discuss its merits and demerits.

2. What is time series analysis? discuss it’s importance in business.

3. Find the value of mode from the subsequent data

Weight (kg) : 93–97 98–102 103–107 108–112

No. of students : 2 5 12 17

Weight (kg) : 113–117 118–122 123–127 128–132

No. of students : 14 6 3 1

4. What is standard deviation? discuss the importance of it.

5. Calculate three yearly moving averages of the production figures provided beneath.

Year : 1995 1996 1997 1998 1999 2000 2001

Production (in tonnes) : 224 213 202 215 222 244 236

6. Compute Quartile deviation and it’s co-efficient from the subsequent data.

Life expectancy (in months) : 79 43 40 34 42 41

No. of patients : 4 7 15 8 7 2

7. What is skewness? discuss the different methods used to measure it?

**PART B**— (4 * 15 = 60 marks)

ans any 4 ques..

8. Find the missing frequency from the subsequent data :

**Marks :**0–10 10–20 20–30 30–40 40–50 50–60

No. of students : 5 15 20 ? 20 10

The arithmetic mean is 34 marks.

9. Find Karl Pearson’s co-efficient of correlation from the subsequent data :

Wages (Rs.) : 100 101 102 102 100 99 97 98 96 95

Cost of residing : 98 99 99 97 95 92 95 94 90 91

10. What is moving average? elaborate its uses in time series?

11. Find out the co-efficient of mean deviation from the subsequent data :

Age (in years) : 0–10 10–20 20–30 30–40 40–50 50–60 60–70 70–80

No of persons : 20 25 32 40 42 35 10 8

12. There were 500 workers working in a factory. Their mean wage was computed as Rs. 200. Later on it was discovered that the wages of 2 workers were misread as Rs. 180 and Rs. 20 in place of Rs. 80 and Rs. 220.

Find out the accurate avg. wage.

13. From the subsequent info compute Karl Pearson’s co-efficient of skewness and also Quartile co-efficient of skewness.

Measures Place A Place B

Mean 256.5 240.8

Median 201.0 201.6

Standard deviation 215.4 181.1

3rd quartile 260.0 242.0

1st quartile 157.0 164.2

14. The subsequent data is found from inquiries into the budget of the middle class families of a city.

Percentage of expenditure Group price 2000 Index number 2001

Food 35 350 440

Fuel and lighting 10 220 330

Clothing 20 230 440

Rent 15 160 105

Miscellaneous 20 190 340

What modifications are in the level of cost of residing of 2001, compared to that of 2000?

Earning: Approval pending. |