Quiznetik

Psychological Statistics | Set 1

1. Which of the following are function(s) of inferential statistics?

Correct : C. both (a) and (b)

2. Which of the following is true about inferential statistics?

Correct : B. help in getting an idea about population value from sample value.

3. Parameter in inferential statistics refers to _______

Correct : C. population value

4. A statistic in inferential statistics is related to which of the following?

Correct : A. sample

5. Estimation is the process of ______

Correct : D. inferring parameter from statistic

6. Which one of the following statements is true about hypothesis?

Correct : D. all of the above

7. Which of the following is a null hypothesis?

Correct : B. there is no gender difference in the mean scores of mechanical aptitude.

8. The opposite of null hypothesis is known as _______

Correct : C. alternate hypothesis

9. Which of the following is an alternate hypothesis?

Correct : A. there is significant gender difference in the mean scores of mechanical aptitude.

10. Some statement or assertion above a population is known as _____

Correct : D. a statistical hypothesis

11. A hypothesis in which there is no indication of direction of change or relation is called a ________

Correct : B. non directional hypothesis

12. Tests used to test non directional hypothesis are

Correct : B. two-tailed tests

13. For testing H0: 1=2 against H0:12 we have the ______

Correct : B. two-tailed test

14. The alternate hypothesis for the null hypothesis H0: 1 < 2 is______

Correct : A. h1: 1>2

15. For testing which of the following hypothesis two-tailed test is used?

Correct : C. h0: 1= 2 against h1: 1 2

16. For testing which of the following hypothesis one tailed test is used?

Correct : B. directional hypothesis

17. For testing which of the following hypothesis one tailed test is used?

Correct : C. experimental group has a higher mean y score than the control group after the treatment.

18. Statistical tests are designed to test the ______

Correct : D. null hypothesis

19. Which of the following hypothesis are accepted or rejected?

Correct : A. alternate hypothesis

20. Hypothesis testing deals with ______

Correct : A. prediction of population values based on sample values

21. Which of the following is type I error?

Correct : C. the error of rejecting h0 when h0 is true

22. Which of the following is type II errors?

Correct : C. the error of accepting h0 when h0 is false

23. The probability of type I error is _____

Correct : C. level of significance

24. Sampling distributions are distributions formed by ________

Correct : B. sample values

25. Sampling distribution of mean values is distribution formed by ______

Correct : C. sample mean values

26. Which of the following statements is true about sampling distributions?

Correct : D. all of the above.

27. Which of the following is standard error?

Correct : D. standard deviation of sample distribution.

28. Which of the following are true about standard error?

Correct : C. both (a) and (b)

29. Which of the following is a statistically large sample?

Correct : B. 45

30. The term statistical significance refers to ________

Correct : D. the inference that the observed effects are unlikely to be due to chance.

31. If we take level of significance as 0.01 then the confidence limit will be

Correct : C. 99%

32. Critical ratio for large independent sample is given by the formula

Correct : C. z = se of the difference difference between means

33. The critical ratio is found to be 2.63 while testing H0: 1=2 against H1: 1  2. Then which of the following statements is true?

Correct : D. h0 is rejected at 0.01 level

34. While dealing with small samples, preference is given to

Correct : B. testing a given hypothesis

35. The critical region is the region of

Correct : C. rejection of h0 when h0 is true

36. ‘Student’ was the pen name of

Correct : B. gosset

37. Under which of the following circumstances ‘t’ distribution is used?

Correct : C. both (a) and (b)

38. Which of the following are the properties of ‘t’ distribution?

Correct : A. ranges from minus infinity to plus infinity

39. As sample size increases the ‘t’ distribution approaches a

Correct : D. normal distribution

40. The degrees of freedom for which the tabled ‘t’ value is found for test of significance of mean is given by

Correct : C. n – 1

41. The degrees of freedom for testing significance of difference between two means for small independent samples is

Correct : C. n1 + n2 – 2

42. If the samples are dependent, the difference between mean can be tested using the formula.

Correct : A. t = nsd

43. Which of the following is the ‘t’ value for the following data (small independent samples) X1= 12, X2 =11, n1 =5, n2=7, s1 = 1.12, s2 = 2.31

Correct : C. 0.89

44. Normal distribution was defined specially by ------- a) Laplace b) Gauss c) DeMoivre d) None of these 59.Which of the following is significance of normal distribution in statistical analysis?

Correct : A. many of the dependent variables are commonly assumed to be normally distributed

45. Which of the following is incorrect about normal distribution?

Correct : C. ordinate is minimum at the mean

46. A normal curve shows 1. a distribution of mentally normal persons 2. population distributed equally in various parts 3. greater percentage of cases distributed about the mean score 4. lesser percentage of cases belonging to extreme scores

Correct : B. only 3 and 4 are true

47. A mesokurtic distribution curve is a

Correct : C. both (a) and (b)

48. A leptokurtic distribution shows

Correct : C. steep rise in the middle

49. Which of the following statement is true about normal curve?

Correct : D. all of the above

50. Which of the following is application of normal curve?

Correct : D. all of the above

51. Which of the following is true about skewed distribution?

Correct : D. the more mean moves away from mode, larger skewness

52. Which of the following statements is true about skewed distribution?

Correct : D. all of the above

53. Which of the following statements is false?

Correct : D. none of these

54. Which of the following statements is true about measures of skewness?

Correct : D. all of the above

55. Which of the following statements is true about platykurtic curve as compared to normal curve?

Correct : D. all of the above

56. A distribution is leptokurtic if the calculated value of kurtosis in terms of percentile is - ------

Correct : B. less than 0.263

57. A distribution is platykurtic if the calculated value of kurtosis in terms of percentile is - ------

Correct : C. greater than 0.263

58. ANOVA test is based on ------

Correct : A. variance ratio

59. ANOVA is used when -------

Correct : A. there are more than two groups

60. Which of the following test is used in ANOVA

Correct : C. f-test

61. In ANOVA, F-value is calculated using which of the following formula?

Correct : B. variancewithin groups variancebetween groups

62. The assumption basic to Analysis of Variance is

Correct : D. all of the above

63. Total sum of squares 2) Correction 3) Within sum of squares 4) Between sum of squares

Correct : B. 3, 2, 4, 1

64. The mean sum of squares (MS) is

Correct : B. the sum of squares divided by its degrees of freedom

65. In ANOVA independent variables are called

Correct : C. factors

66. In ANOVA different categories of an independent variable are called.

Correct : B. levels

67. If there are more than one independent variables we use

Correct : B. anova for factorial design

68. In one way ANOVA how many F values are calculated

Correct : C. 1

69. If there are two independent variables then how many effects are found in ANOVA?

Correct : C. 3

70. Which of the following statements are true about Two-way ANOVA with 2 x 3 design.

Correct : D. all of the above

71. For testing the significance of difference between means, ANOVA analyses ------

Correct : D. variances

72. In one way ANOVA, if the calculated F value is greater than the tabled value of F, then

Correct : D. mean difference between atleast two groups in the set will be significant

73. Which of the following is true about ANOVA?

Correct : C. it is a parametric test

74. The calculated value of kurtosis in terms of percentile for a given data is found to be 0.321, then the distribution is

Correct : C. platykurtic

75. The process of grouping the related data in to classes is called

Correct : D. Classification

76. Non-measurable characteristics of data are called

Correct : B. Attributes

77. Measurable characteristics of data are called

Correct : A. Variables

78. If the upper limit of a class and lower limit of the next class in a class interval are the same, it is a/an

Correct : B. Exclusive Class Interval

79. Two-dimensional diagrams are also called

Correct : B. Area diagrams

80. When the aggregate and their divisions are to be shown together, the diagram used is

Correct : C. Pie diagram

81. Cumulative frequency curve is also called

Correct : C. Ogive

82. Frequency polygon is called

Correct : B. Line graph

83. If the highest frequency of a frequency distribution occurs at the lowest values or highest values, the distribution is

Correct : C. Skewed

84. Lack of symmetry is called

Correct : C. Skewness

85. The sum of squares of deviations of a set of numbers from their mean is the property of

Correct : A. Arithmetic mean

86. ______ is a positional average.

Correct : B. Median

87. Value of an item which occurs more frequently than others is

Correct : D. Mode

88. In a moderately asymmetrical distribution

Correct : A. Mean≠ median ≠ mode

89. Histograms are drawn for

Correct : B. Continuous series

90. Histogram is useful to locate graphically the value of

Correct : C. Mode

91. The sum of squares of deviation is least when measured from

Correct : B. Mean

92. Stsndard deviation is defined as

Correct : C. Square root of average of squares of deviations taken from the value of mean

93. The value of median is diagrammatically calculated by drawing

Correct : B. Ogive

94. In a positively skewed distribution

Correct : A. Mean > median > mode

95. _____ is a relative measure of variation based on standard deviation.

Correct : C. Coefficient of variation

96. The value of an item which occupies the central position when the items are arranged in the ascending or descending order is

Correct : C. Median

97. In discrete series, items having ____ frequency is taken as mode.

Correct : A. Highest

98. Measure of variation of the items from some central value is referred to as

Correct : B. Dispersion

99. Which of the following is not a measure of dispersion?

Correct : C. Median

100. _____ is the simplest possible measure of dispersion.

Correct : D. Range