Skip to content

Course home

Sign up

2.2 Data presentation and interpretation

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041
Question 35

The CO emissions of 24 cars have mean 0.25 g/km and standard deviation 0.06 g/km.

A 25th car, with a CO emission of 0.49 g/km, is added to the sample.

a.

Find the mean CO emission of the 25 cars.

[2]
b.

Find the standard deviation of the CO emissions of the 25 cars.

[3]
Markscheme

2.2 Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 Data presentation and interpretation

105 exam-style questions on WJEC A Level Maths 2.2 Data presentation and interpretation, covering 2.2.1 Data presentation and interpretation, 2.2.2 Data presentation and interpretation, 2.2.3 Data presentation and interpretation, 2.2.4 Data presentation and interpretation, 2.2.5 Data presentation and interpretation, 2.2.6 Data presentation and interpretation, 2.2.7 Data presentation and interpretation, 2.2.8 Data presentation and interpretation, and 2.2 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank