1. The median of a series is 10. Two additional observations 8 and 15 are added to the series. The median of the new series will be ____________________
Correct : D. 10
2. If the mean ages of a group of boys is 20 years, then the mean of their ages after 2
years is __________
Correct : B. 22
3. The median of a frequency distribution is graphically with the help of ______________-
Correct : B. Ogive
4. Find the value of x, if the mode of the data is 25. 15,20,25,18,14,15,25,15,18,16,20,25,20,x
Correct : C. 25
5. Two types of ogives meet at ______________
Correct : C. Median
6. The mode of a frequency distribution can be determined graphically by
Correct : C. Histogram
7. Calculate median 35,23,45,50,80,61,92,40,52,61
Correct : D. 51
8. Find the range and the coefficient of range for the following values 25,32,85,32,42,10,20,18,28
Correct : D. 75
9. Variance= _______________
Correct : D. S.D2
10. If all the values of a series are multiplied by 5 what happens to the S.D
Correct : C. Multiplied by 5
11. For a frequency distribution M.D from mean is completed by _____________
Correct : C. ∑fIdI/n
12. The mean duration of the series : a,a+d,a+2d,………,a+2n from its mean is
Correct : D. n(n+1)d/2n+1
13. Find the sum of the duration of the variable values 3,4,6,8,14 from their mean
Correct : D. 7
14. The varience of 15 observations is 4, if each observation is increased by 9, the
varience of the resulting observation is
Correct : C. 4
15. Find the value of third quartile if the values of first quartile and quartile deceiation
are 104 & 108 respectively
Correct : D. 140
16. Mean deceiation which is calculatedis
Correct : B. Median
17. Find the probable error if r=0.6 and n=64
Correct : D. 0.43
18. Maximum positive value of coefficient of correlation is ___________-
Correct : B. 1
19. If correlation coefficient r is –ve, both the regression coefficients are ____________
Correct : C. – ve
20. When the values of two variables change in the same direction, there is
_________correlation
Correct : A. + ve
21. A time series consists of
Correct : C. four components
22. The forecarts on the bacis of a time series are
Correct : B. true to great extent
23. The component of a time series attached to long term variations is termed as:
Correct : B. secula
24. The component of a time series which is attached to short term fluctuations is
Correct : D. allthe above
25. A lock-out in a factory for a month is associated with the component of a time series is :
Correct : A. irregular movement
26. Secular trend is indicative of long term variation towards
Correct : C. either increase or decrease
27. seasonal variation means the variations occurring within
Correct : B. parts of a year
28. Index number is a ______________
Correct : D. all the above
29. Index numbers are expressed:
Correct : A. in percentages
30. Index numbers help
Correct : D. all the above
31. The best average for constructing an index numbers is _________________
Correct : C. Geometric mean
32. Index no. for the base period is always taken as
Correct : D. 100
33. _________ play a very important part in the construction of index numbers.
Correct : A. weights
34. Index numbers show ____________ changes rather than absolute changes.
Correct : B. percentage
35. Index number is equal to_________________
Correct : B. average of the price relatives
36. Laspeyer’s index formula use the weights of the
Correct : A. base year
37. If the index number is independent of the units of measurement ,then it satisfies
Correct : C. unit test
38. Statistics is defined in terms of numerical data in the___________
Correct : B. plural sense
39. Statistics is applied in ____________________
Correct : D. all the above
40. Which of the following represents statistics
Correct : C. a group of values in a set
41. Statistics deals with
Correct : B. quantitative information
42. Statistical data are collected
Correct : B. for a given purpose
43. Statistical results are
Correct : C. true on an average
44. Statistics does not study
Correct : A. individuals
45. Statistics are
Correct : D. all above
46. Statistical methods
Correct : D. all these
47. Statistics is ________________
Correct : C. both
48. The mean of a observation is x. If k is added to each observation then new mean is_______________
Correct : B. x+k
49. Mean deviation which is calculated is minimum at
Correct : B. median
50. Find the sum of the deviation of the variable values 3,4,6,8,14 from their mean
Correct : B. 0
51. Method of least squares to fit in the trend is applicable only if the trend is____________
Correct : C. both a & b
52. If the prices of all commodities in a place have increased 1.25 times more on the base period price. The index number of prices of that place is now