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Cambridge IGCSE Statistics practice

If a trend line slopes downward, what does this indicate about the data?

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MCQ

Type

cambridge_mcq

Style

Topic

Time series

Exam-style question

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If a trend line slopes downward, what does this indicate about the data?.

  1. A.Data values are increasing
  2. B.Data values are decreasing
  3. C.Data values are stable
  4. D.Data values are random

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Paper 1 structured question: Time series

Paper 1Statistical Techniques3 marks

Data Table

Monthly Sales Data

Sales units for 7 months

MonthSales (units)
1120
2130
3125
4140
5135
6150
7145
  1. a

    Calculate the 3-month moving averages for months 2 to 6.

    Aim for approximately 3 distinct marking points.

    [3]