Lesson 2a.10

2a.10 Interpret a distribution of data in terms of skewness identified from inspection or... Quiz: Pearson Edexcel Statistics, Unit 2

20 questions

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Lesson 2a.10, Interpret a distribution of data in terms of skewness identified from inspection or...: 20 multiple choice questions for the Pearson Edexcel GCSE Statistics (1ST0), Unit 2: Processing, representing and analysing data, written with Revision Ninja.

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The 20 questions

  1. In a positively skewed income distribution, where do most people's incomes lie relative to the mean?

    • Above the mean
    • At the median
    • Below the mean
    • Equal to the mean

  2. What is the typical characteristic of a negatively skewed age distribution in a care home?

    • Even age spread
    • Most residents older
    • Symmetric distribution
    • Most residents younger

  3. Test scores are mostly near the top, with a few low scores. Which skew does this suggest?

    • Negative skew
    • Symmetry
    • Positive skew
    • Bimodal

  4. A house price distribution is positively skewed. Which average best represents a typical house price?

    • Range
    • Mean
    • Median
    • Total

  5. For data with a long tail to the right, how do the mean and median compare?

    • Mean equals median
    • Mode exceeds mean
    • Mean exceeds median
    • Median exceeds mean

  6. In a perfectly symmetrical distribution, how do the mean and median compare?

    • Median much greater
    • Mean much greater
    • Unrelated values
    • Approximately equal

  7. A dataset has a mean of 52 and a median of 48. What does this indicate?

    • Negative skew
    • Positive skew
    • Zero variance
    • Symmetry

  8. Data with a long tail of high values exhibits which type of skewness?

    • Zero skew
    • Positive skew
    • Symmetrical distribution
    • Negative skew

  9. Which average is best used to represent a positively skewed wealth distribution with extreme high values?

    • median
    • mean
    • range
    • mode

  10. A distribution has a long left tail. Which description is most accurate?

    • Negatively skewed
    • Symmetrical
    • Uniformly distributed
    • Positively skewed

  11. If two data sets have equal means and one is positively skewed, how do their medians compare?

    • Median is zero
    • Median is lower
    • Median is higher
    • Medians are equal

  12. What skewness is indicated by a histogram with bars that slope down gradually to the right?

    • Symmetrical
    • Negative skew
    • Positive skew
    • Zero skew

  13. Which feature is most likely in an examination results distribution that is negatively skewed?

    • Mean equals mode
    • Most scored low
    • Scores are uniform
    • Most scored high

  14. How would you describe a distribution with a skewness value of -2.1?

    • Symmetrical
    • Negatively skewed
    • Bimodal
    • Positively skewed

  15. If values above the median are more spread out than values below, what type of skew is present?

    • Negative skew
    • Positive skew
    • Zero skew
    • No skew

  16. What does a positively skewed distribution of journey times imply about some trips?

    • No journeys vary
    • All journeys equal
    • Much shorter journeys
    • Much longer journeys

  17. What does a mean noticeably less than the median suggest in a roughly symmetric histogram?

    • Strong positive skew
    • Perfect symmetry
    • Data errors
    • Slight negative skew

  18. Higher tier: a data set has mean 15, median 12 and SD 4.5. Interpret the skew.

    • Positive skew of 2
    • Positive skew of 0.5
    • Negative skew of 2
    • Symmetry

  19. In a positively skewed distribution, where does the mode lie relative to the mean?

    • To the right
    • Exactly equal
    • To the left
    • Above the median

  20. What does a negatively skewed test score distribution suggest about the cohort performance?

    • Zero variance
    • Mostly low scores
    • Mostly high scores
    • Balanced spread

All Pearson Edexcel Statistics quizzes