BBA – 1ST Sem.

Times-2hours MM-50

BBA – 1^ST Sem.

Attempt all

Part – A (2 Marks)

1. In a BBA class of 128 students, 48 have failed, securing 25 marks on an average. If the total marks of all the students the 5120 find the average marks second by the students passing the test.
2. From the following locate the medium

11

71

35

55

62

13

15

75

3. Mean of 50 items was 80. It was discovered later that two items were wrongly taken as 23 and 24 place of 32 and 42 respectively. Find correct mean.
4. From the following find the co-efficient of variation. X = 40, v = 25
5. If the co-efficient of two series are 75% and 90% and their S.D.S. are 15 and 18 respectively, find their mean
6. Determine person’s coefficient of correlation when x y = 150, x = 60, y = 50, x² = 200 and N = 100
7. Determine the number of pairs of observation when d² = 231 and r (s) = - 0.4
8. Find regression equation of x y = 20, x = 1.5, y = 2 and xy = 0.60
9. If x y = - 26, x² = 40, y² = 20, x = 0 find b x y.
10. Determine the value of range and its coefficient

Marks	30	20	40	50	10	60	75	25
No. of stds.	5	6	7	9	3	4	8	7

Part – B (Attempt any 6)

1. From the following series, determine inter duartile range, Duartile deviation and their coefficient

Roll no: Marks:

1001 94

1002 95

1003 96

1004 93

1005 87

1006 79

1007 73

1008 69

2. Find the coefficient of correlation between two x and y wrong short cut

X: Y:

5 1

10 6

5 2

11 8

12 5

4 1

3 4

2 6

7 5

6 2

3. two regression equations:

Sales: Purchase:

91 71

97 75

108 69

121 97

67 70

124 91

51 39

73 61

111 80

57 47

4. Find the complained and coefficient of variation from the following data.

Factors	X	Y
N X	100 40 10	200 50 12

5. Find standard deviation and coefficient of variation from the following data.

Expenditure Below (Rs.) No. of students

5 6

10 16

15 28

20 38

25 42

6. In a series these are 5 items out of which the values of the 3 items are 3, 5 and 7 respectively. If the mean and standard deviation of the series the 5 and 3 respectively find the values of other two items.
7. Find medium

Marks: bellow 10 No. of students: 4

10 – 30 6

30 – 60 10

60 – 100 7

100 and above 3

8. From the following data find the two entreme quartile

Size of shoes: Frequency sales:

8’ 7

6.5” 8

7.5” 10

7” 15

5.5” 40

6” 25

4.5” 28

4” 18

5” 10

9. Following are the ranks given by 3 judges in a contest. Find the degree of correlation between 1^st and 2^nd, 2^nd and 3^rd, 3^rd and 1^st. And also mention which pair of judges agree or disagree the most:

Judge 1: 1 3 7 9 2 4 10 8 6 5

Judge 2: 7 5 4 6 1 2 3 8 10 9

Judge 3: 4 10 3 9 2 8 1 5 7 6