| Exam Board | CAIE |
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| Module | S2 (Statistics 2) |
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| Year | 2017 |
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| Session | June |
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| Topic | Hypothesis test of a normal distribution |
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1 In a survey of 2000 randomly chosen adults, 1602 said that they owned a smartphone. Calculate an approximate \(95 \%\) confidence interval for the proportion of adults in the whole population who own a smartphone.