Skip to content

ZIMSEC O-Level Additional Mathematics

6.2.7.1Point estimation of the mean and variance

Point estimation of the mean and variance 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. 6.2.7.1.1Form 4: recognise the importance of estimation.
  2. 6.2.7.1.2Form 4: calculate unbiased estimates of the population mean and variance and the standard error of the mean.

Lessons

  • Point estimates: unbiased estimators of the mean and variance

    40 min

    Full access

Join to read every lesson, or see what Full access includes.

Sample question

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

Point estimation of the mean and variance: sample question

1 mark

A random sample of 25 learners' test marks gives ∑x=1835\sum x = 1835. Find an unbiased estimate of the population mean mark.

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

Turn Point estimation of the mean and variance into a strength.

Practise with instant marking, see your mastery grow and get a study plan built around your exam date.