By Sophie Goldie

ISBN-10: 1444146505

ISBN-13: 9781444146509

This fresh sequence has been written for the college of Cambridge overseas Examinations direction for AS and a degree arithmetic (9709). This identify covers the necessities of S1 and S2. The authors are skilled examiners and lecturers who've written widely at this point, so have ensured all mathematical ideas are defined utilizing language and terminology that's acceptable for college kids the world over. scholars are provded with transparent and precise labored examples and questions from Cambridge overseas earlier papers, in order that they give you the chance for many crucial examination perform. each one ebook incorporates a unfastened CD-ROM which positive aspects the original 'Personal train' and 'Test your self' electronic assets that would aid scholars revise and toughen innovations clear of the study room: - With own instruct each one scholar has entry to audio-visual, step by step aid via exam-style questions - The attempt your self interactive a number of selection questions determine weaknesses and element scholars within the correct course

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**Additional info for Cambridge International AS and A Level Mathematics: Statistics**

**Sample text**

I) (ii) 42 Was this exceptional? Do you think the crop was affected by the unusual weather or was the higher yield part of the variability which always occurs? 0 mm. A sample of eight ball bearings was taken from the production line and the diameters measured. 1 S1 1 Calculate the mean and standard deviation of the diameters. Do you think the machine is correctly set? On page 29 you saw the example about Robert, the student at Avonford College, who collected data relating to the heights of female students.

Comment on the players’ goal scoring records. For a set of 20 items of data ∑ x = 22 and ∑ x 2 = 55. Find the mean and the standard deviation of the data. For a data set of 50 items of data ∑(x − x )2 f = 8 and ∑ x f = 20. Find the mean and the standard deviation of the data. 41 6 Two thermostats were used under identical conditions. The water temperatures, in °C, are given below. Thermostat A: Thermostat B: Exploring data S1 1 24 26 25 26 27 23 23 22 26 28 (i) Calculate the mean and standard deviaton for each set of water temperatures.

For a set of ten data items, ∑(x – 20) = – 140 and ∑(x – 20)2 = 2050. Find their mean and standard deviation. (i) 7 8 9 10 11 For a set of 20 data items, ∑(x + 3) = 140 and mean and standard deviation. ∑(x + 3)2 = 1796. 4. Find the value of a and the standard deviation. ∑(x + a)2 = 1854. 9. Find the value of a and the standard deviation. ∑(x – a)2 = 75. The mean The length of time, t minutes, taken to do the crossword in a certain newspaper was observed on 12 occasions. The results are summarised below.

### Cambridge International AS and A Level Mathematics: Statistics by Sophie Goldie

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