Edexcel GCSE

Statistics

Unit 2 Theme: Cars

Controlled Assessment For submission May 2014 only

You do not need any other materials.

5ST02/01

Paper Reference

This controlled assessment task is valid from March 2013 to May 2014. Centres must submit their moderation sample(s) by 15 May 2014. Please note that this controlled assessment task will ONLY be valid for assessment in May 2014. Teachers must ensure that students are completing the correct task for a particular year. Further guidance can be found on the Edexcel website (www.edexcel.com).

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GCSE Statistics 5ST02 Foundation Tier Formulae Formulae Sheet You must not write on this page. Foundation Tier Anything you write on this page will gain NO credit. Mean of a frequency distribution =

∑ fx ∑f ∑ fx , where x is the mid-interval value. ∑f

Mean of a grouped frequency distribution

=

2

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GCSE Statistics 1389 GCSE Statistics 5ST02 Higher Tier Formulae Formulae Sheet You must not write on this page. Anything you write on this page will gain NO credit. Higher Tier Mean of a frequency distribution =

∑ fx ∑f ∑ fx , where x is the mid-interval value. ∑f

2

Mean of a grouped frequency distribution

=

Variance

∑ (x − x ) =

n

Standard deviation (set of numbers)

⎡ x 2 ⎛ x ⎞2 ⎤ ⎢∑ −⎜ ∑ ⎟ ⎥ ⎜ n ⎟ ⎥ ⎢ n ⎝ ⎠ ⎦ ⎣ ⎡ ∑ ( x − x )2 ⎤ ⎥ ⎢ n ⎥ ⎢ ⎦ ⎣ where x is the mean set of values.

or

Standard deviation (discrete frequency distribution)

2 ⎡ ∑ fx 2 − ⎛ ∑ fx ⎞ ⎤ ⎢ ⎜ ⎟ ⎥ ⎢ ∑ f ⎜∑f ⎟ ⎥ ⎝ ⎠ ⎦ ⎣

or

⎡ ∑ f ( x − x )2 ⎤ ⎢ ⎥ ⎢ ∑f ⎥ ⎣ ⎦ 1− 6∑ d 2

Spearman’s Rank Correlation Coefficient

n(n 2 − 1)

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THEME: Cars Introduction In this task you are going to investigate cars. The following are some possible ideas to investigate but there are many others that you might choose. You may want to collect information about: • • • • • The prices of used cars locally...