PGDE Regular Entrance 2082 Part 4

40. Which method is best for studying cause-effect relationships?

a. Experimental b. Survey c. Case study d. Observation

41. Which of these is a measure of central tendency?

a. Mean b. Median c. Mode d. All of the above

42. The sum of deviations from the mean is always: a. Zero b. Positive c. Negative d. Undefined

43. Which graph is used to represent frequency distribution? a. Histogram b. Pie chart c. Line graph d. Scatter plot

44. Which of these is a measure of dispersion? a. Range b. Variance c. Standard deviation

d. All of the above

45. If mean = median = mode, the distribution is: a. Skewed b. Normal c. Bimodal d. Uniform

46. Which symbol represents population mean? a. μ b. x̅ c. σ d. n

47. Which test compares means of two groups? a. t-test b. Chi-square c. ANOVA d. Correlation

48. Which correlation coefficient ranges between -1 and +1? a. Pearson’s b. Chi-square c. F-test d. Z-score

49. What is the probability of getting heads in a fair coin toss? a. 0 b. 0.25 c. 0.5 d. 1

50. Which of these is used to standardize scores? a. Z-score b. Mean c. Median d. Variance

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