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A-Level Pearson Edexcel Level 3 GCE In Statistics (9ST0/03) Paper 03: Statistics in Practice Summer Exam Paper (AUTHENTIC MARKING SCHEME ATTACHED)$9.49
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, Answer ALL questions. Write your answers in the spaces provided.
1 Following an illness, patients might need therapy in order to help improve their balance.
The therapy offered is called standard balance training.
Giovanni, a physiotherapist, thinks that his patients may be helped further by using a
video game designed to improve balance.
He designs an experiment to test his theory.
He randomly assigns patients to one of two groups.
One group receives a course of therapy including standard balance training and the
video game. The other group receives only standard balance training.
(a) State which of the two groups described above is the control group.
(1)
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(b) Explain, in context, why Giovanni randomly assigns each patient to one of the
two groups.
(1)
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(c) Explain why Giovanni’s experiment design is not double-blind.
(1)
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3
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