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GATE 2022 XH5 (Psychology) – Question 48

Research Methods and Statistics · Statistics in Psychology: Central tendency and dispersion, normal probability curve, parametric and non-parametric tests, effect size and power analysis · 2 marks · Multiple select

Which of the following statement(s) regarding test scores and their interpretations is/are correct?

  1. Frequency distribution are graphs to help us understand the distribution of test scores
  2. Normal probability distribution is a theoretical distribution to help us understand the distribution of test scores
  3. Central tendency measures are numerical tools to help us locate the middle of a distribution of a test score
  4. Measurement of variability are numerical tools to help us understand the spread of a distribution of a test score

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Show answer and explanation

Correct answer: (A) Frequency distribution are graphs to help us understand the distribution of test scores; (B) Normal probability distribution is a theoretical distribution to help us understand the distribution of test scores; (C) Central tendency measures are numerical tools to help us locate the middle of a distribution of a test score; (D) Measurement of variability are numerical tools to help us understand the spread of a distribution of a test score

Explanation

All four are standard descriptions: frequency distributions show how scores are spread, the normal curve is a theoretical model, central tendency locates the middle, and variability measures the spread.