Skip to content

Course home

2.2.12 Variance and standard deviation

2.2.12 Variance and standard deviation

MediumHard
123
Question 3

Six observations have mean 10. Five of the observations are 4,7,9,12,134,7,9,12,134,7,9,12,13.

a.

Find the sixth observation.

[2]
b.

Calculate the sample standard deviation of all six observations.

[2]
Markscheme

2.2.12 Variance and standard deviation Questions

  1. A Level
  2. /Maths
  3. /2.2.12 Variance and standard deviation

8 exam-style questions on OCR (MEI) A Level Maths 2.2.12 Variance and standard deviation. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank