By Sophie Goldie
ISBN-10: 1444146505
ISBN-13: 9781444146509
This fresh sequence has been written for the college of Cambridge foreign Examinations path for AS and a degree arithmetic (9709). This identify covers the necessities of S1 and S2. The authors are skilled examiners and academics who've written generally at this point, so have ensured all mathematical innovations are defined utilizing language and terminology that's applicable for college kids internationally. scholars are provded with transparent and distinct labored examples and questions from Cambridge foreign earlier papers, in order that they give you the option for many crucial examination perform. each one booklet includes a unfastened CD-ROM which beneficial properties the original 'Personal teach' and 'Test your self' electronic assets that may support scholars revise and strengthen suggestions clear of the school room: - With own coach each one scholar has entry to audio-visual, step by step help via exam-style questions - The attempt your self interactive a number of selection questions establish weaknesses and aspect scholars within the correct path
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Extra info for Cambridge International AS and A Level Mathematics: Statistics
Example text
6 Find the mean and the standard deviation of a sample with ∑ x = 960, ∑ x 2 = 18 000, n = 60. 7 S1 1 Find the mean and the standard deviation of a sample with ∑( x − x ) 2 = 2000, ∑ x = 960, ∑ f = 60. 3 ... 3 ... ). As part of her job as quality controller, Stella collected data relating to the life expectancy of a sample of 60 light bulbs produced by her company. The mean life was 650 hours and the standard deviation was 8 hours. A second sample of 80 bulbs was taken by Sol and resulted in a mean life of 660 hours and standard deviation 7 hours.
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. (ii) Which is the better thermostat? Give a reason. A second sample of data was collected using thermostat A. 25 24 24 25 26 25 24 24 (iii) Find the overall mean and the overall standard deviation for the two sets of data for thermostat A. 7 Ditshele has a choice of routes to work. She timed her journey along each route on several occasions and the times in minutes are given below.
She timed her journey along each route on several occasions and the times in minutes are given below. Town route: Country route: (i) (ii) 8 15 19 16 21 20 20 28 22 21 18 Calculate the mean and standard deviation of each set of jourmey times. Which route would you recommend? Give a reason. In a certain district, the mean annual rainfall is 80 cm, with standard deviation 4 cm. (i) (ii) One year it was 90 cm. Was this an exceptional year? The next year had a total of 78 cm. Was that exceptional? J ake, a local amateur meteorologist, kept a record of the weekly rainfall in his garden.
Cambridge International AS and A Level Mathematics: Statistics by Sophie Goldie
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