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2.5.3 Data presentation and interpretation

2.5.3 Data presentation and interpretation

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Question 1

The masses, m m\,m grams, of 40 items are coded using x=m−502x=\dfrac{m-50}{2}x=2m−50​. The coded data have mean 3.5 and variance 4.84.

a.

Find the mean mass.

[1]
b.

Find the variance of the masses.

[2]
c.

Interpret the standard deviation of the masses.

[1]
Markscheme

2.5.3 Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.5.3 Data presentation and interpretation

8 exam-style questions on CCEA A Level Maths 2.5.3 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

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