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2.2.6 Measures of average and spread

Card 1 of 20

The ordered data are 4, 6, 7, 9, 11, 15. What is the median?

A

Its contribution to the total of all observations.

B

8

C

The efficient variance formula for raw data is Var⁡(X)=∑xi2n−xˉ 2\boxed{\operatorname{Var}(X)=\frac{\sum x_i^2}{n}-\bar{x}^{\,2}}Var(X)=n∑xi2​​−xˉ2​.

D

The class with the greatest frequency.

Card 1 of 20

2.2.6 Measures of average and spread Flashcards

  1. A Level
  2. /Maths
  3. /2.2.6 Measures of average and spread

20 flashcards on OCR A Level Maths 2.2.6 Measures of average and spread: the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.

Flashcards