Cambridge IGCSE Statistics practice

Paper 1 structured question: Transformations of data sets

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Paper

Marks

Topic

Transformations of data sets

Exam-style question

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Paper 1Statistical Techniques4 marks

A dataset consists of the numbers 3, 6, 9, 12, and 15.

Description

Consider the dataset: 3, 6, 9, 12, 15.

a
Calculate the mean of the dataset after multiplying each number by 2.
Your answer
Aim for approximately 2 distinct marking points.
[2]
b
Calculate the standard deviation of the dataset after multiplying each number by 2.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 1Statistical Techniques4 marks

Description

Consider the dataset: 2, 4, 6, 8, 10.

a
Calculate the mean of the dataset after adding 3 to each number.
Your answer
Aim for approximately 2 distinct marking points.
[2]
b
Calculate the standard deviation of the dataset after adding 3 to each number.
Your answer
Aim for approximately 2 distinct marking points.
[2]