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ZIMSEC O-Level Additional Mathematics

6.2.7.2Interval estimation: confidence intervals

Interval estimation: confidence intervals in ZIMSEC O-Level Additional Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic20 practice questions1 lesson

Learning objectives

What the syllabus expects you to be able to do.

  1. 6.2.7.2.1Form 4: calculate confidence intervals for a population mean at the 5% or 1% significance level (95% or 99% confidence).

Lessons

  • Confidence intervals for a population mean

    45 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Interval estimation: confidence intervals: sample question

1 mark

A population has standard deviation 14. A random sample of 49 is taken. Find the margin of error of a 95% confidence interval for the population mean.

Only if the answer has a unit, e.g. cm or km/h.

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