Lesson 2f.01

2f.01 Identify trends in data through inspection and by calculation of 4 or other determined... Quiz: Pearson Edexcel Statistics, Unit 2

20 questions

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Lesson 2f.01, Identify trends in data through inspection and by calculation of 4 or other determined...: 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. What is the 4-point moving average of 10, 12, 14 and 16?

    • 14
    • 12
    • 52
    • 13

  2. Quarterly sales are 20, 24, 28, 32 and 36. What is the first 4-point moving average?

    • 26
    • 24
    • 30
    • 28

  3. What is the 4-point moving average of 24, 28, 32 and 36?

    • 28
    • 32
    • 30
    • 26

  4. What technique is commonly used to smooth time series data and reveal trends?

    • Moving averages
    • Frequency polygons
    • Bar charts
    • Pie charts

  5. What does the gradient of a trend line represent in a time series graph?

    • Rate of change
    • Seasonal variation
    • Initial value
    • Total frequency

  6. A trend line has a gradient of 3 with weekly data. How is this interpreted?

    • Increase of 3 weekly
    • Decrease of 3 weekly
    • Total of 3 items
    • Increase of 3 daily

  7. What is the primary purpose of a 4-point moving average?

    • Increasing data range
    • Smoothing short-term fluctuations
    • Eliminating outliers completely
    • Finding the mode

  8. Why is a 4-point moving average used for quarterly time series data?

    • Cancels seasonal effects
    • Identifies cyclic trends
    • Removes data anomalies
    • Doubles the sample size

  9. Monthly values are 15, 18, 21, 24, 27 and 30. What is the first 4-point moving average?

    • 21
    • 19.5
    • 18
    • 22.5

  10. How should a trend line drawn by eye be positioned on a scatter graph?

    • Minimising all gradients
    • Joining extreme points
    • Passing through the origin
    • Balancing points around it

  11. What is the 4-point moving average of 10, 15, 20 and 25?

    • 15
    • 70
    • 17.5
    • 20

  12. A downward trend shows a trend line with what gradient?

    • A positive gradient
    • An undefined gradient
    • A negative gradient
    • A zero gradient

  13. Why must trend predictions beyond the last observed data point be treated cautiously?

    • Moving averages fail
    • Patterns may change
    • Sample size increases
    • Data is always discrete

  14. A temperature trend has a gradient of 0.5 degrees per hour. What does this indicate?

    • Rises 0.5 daily
    • Rises 0.5 hourly
    • Falls 0.5 hourly
    • Constant at 0.5

  15. Applying a 4-point moving average to 8, 10, 12, 14 and 16 gives how many moving averages?

    • 4
    • 1
    • 5
    • 2

  16. What is the 4-point moving average of 40, 44, 48 and 52?

    • 48
    • 184
    • 46
    • 44

  17. Three successive 4-point moving averages are 26, 28 and 30. What is the trend direction?

    • Downward
    • Seasonal only
    • No trend
    • Upward

  18. A trend line passes through (1, 100) and (5, 140), where x is the quarter number. What is the gradient per quarter?

    • 10
    • 40
    • 5
    • 140

  19. Which adjustment best smooths a very noisy time series graph?

    • Shorter moving average
    • Removing seasonal indices
    • Longer moving average
    • Using raw data

  20. A trend line has gradient -2.5 kg per month. What is the total change over 12 months?

    • +30 kg
    • -2.5 kg
    • -12 kg
    • -30 kg

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