GCSE · Data representation

Time seriesExam-style questions

Measurements plotted against time and joined in order — why joining is legitimate here but not on a scatter graph, how to describe a trend so it earns the mark, how to spot seasonal variation and use it to predict the next quarter, and why predicting far beyond the data is worthless.

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11 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 1Level 2Level 3Level 4Level 5
  1. 1
    The time series graph shows the number of ice creams (in hundreds) a shop sold each quarter over two years.2468481216202428323640Quarter (1 = Q1 of 2024)Ice creams sold (hundreds)(a) In which quarter were the most ice creams sold, and (b) how many was that?
    Level 1 · 2 marksTry it
  2. 2
    The time series graph shows the number of ice creams (in hundreds) a shop sold each quarter over two years.2468481216202428323640Quarter (1 = Q1 of 2024)Ice creams sold (hundreds)Work out the difference between the sales in quarter 33 and quarter 44.
    Level 1 · 1 markTry it
  3. 3
    An estate agent recorded the number of houses she sold in each quarter of 2023 and 2024.

    The time-series graph below shows this information. Quarter 1 on the graph is the first quarter of 2023 and quarter 5 is the first quarter of 2024.1234567891234567891011121314Quarter (1 = Q1 of 2023)Houses sold(a) Write down the number of houses she sold in quarter 2 of 2024.

    (b) Work out the difference between the greatest and the least number of houses she sold in a quarter of 2023.
    Level 2 · 3 marksTry it
  4. 4
    The time series graph shows the number of ice creams (in hundreds) a shop sold each quarter over two years.2468481216202428323640Quarter (1 = Q1 of 2024)Ice creams sold (hundreds)Describe the pattern the graph shows.
    Level 2 · 2 marksTry it
  5. 5
    Ashdown Hall is a wedding venue. The time-series graph shows the number of weddings held there in each quarter from 2022 to 2024.

    Quarter 1 on the graph is the first quarter of 2022, quarter 5 is the first quarter of 2023 and quarter 9 is the first quarter of 2024.123456789101112131234567891011121314Quarter (1 = Q1 of 2022)Weddings held(a) Write down the number of weddings held in quarter 3 of 2023.

    (b) Describe the trend in the number of weddings held at Ashdown Hall. You must refer to figures from the graph.

    (c) Estimate the number of weddings that will be held in quarter 1 of 2025.
    Level 3 · 5 marksTry it

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