Statistics and Econometrics-Online Practice Exam 1

Test

# Question

1. The algebraic sum of deviations from mean is

Zero

Maximum

Minimum

None of the above

# Question

2. The sum of squares of deviations from mean is

Minimum

Maximum

Zero

None of the above

# Question

3. An additional observation of 15 is included in a series of 11 observations and its mean remains unaffected. The mean of the series is-

15

16

11

6

# Question

4. The median of a series is 10. Two additional observations, of 5 and 20, are added to the series. The median of the new series will-

20

11

18

10

# Question

5. In a batch of 13 students 4 have failed. The marks of the successful candidates were 41, 57, 38, 61, 36, 35, 71, 50 and 40. Find the median marks

37

38

63

54

# Question

6. From the information given below choose the correct answer-

 Factor A Factor B Mean daily wage ₹120 ₹80 No of workers 80 120

Both factories pays equal amount as daily

Factory B pays larger amount as daily wages

Factory A pays larger amount as daily wages

It cannot be determined

# Question

7. The arithmetic of 9 observations is 100 and that of 6 is 80, the combined mean of all the 3 observations will be

102

49

80

92

# Question

8. . The arithmetic mean of the first N natural numbers is

None of the above

# Question

9. For a symmetrical distribution, Q1, and Q3, are 20 and 40 respectively. The value of 50th percentile

30

40

35

20

# Question

10. Pie-diagrams are

One dimensional diagram

Two dimensional diagrams

Three dimensional diagrams

Multi-dimensional diagrams

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