By Roger Porkess; Anthony Eccles; Alan Graham
The highly-acclaimed MEI sequence of textual content books, aiding OCR's MEI established arithmetic specification, has been up to date to check the necessities of the recent requisites, for first instructing in 2004.
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49), we see that Joe's goal scoring is more consistent (or less variable) than Kim's. This is consistent with our previous conclusions when comparing the variability in their scoring record. In practice you will make extensive use of your calculator's statistical functions to find the mean (x), root mean square deviation (rmsd) and standard deviation (s). Invariably most calculators represent the mean by xy but care must be taken when reading off either the root mean square deviation or the standard deviation.
Every day they sit back complacently while those least able to defend themselves, the very old and the very young, run the gauntlet of our treacherous streets. I refer of course to the lack of adequate safety measures for our cyclists, 60% of whom are children or senior citizens. Statistics show that they only have to put one wheel outside their front doors to be in mortal danger. 80% of cycling accidents happen within 1500 metres of home. 26 Last week Denise Cropper became the latest unwitting addition to these statistics.
5 A recent survey of fee-paying schools found that one city had 11 such schools with the fee per student (correct to the nearest £100) being as follows. £3800 £2800 £11100 £3500 £3500 £3700 £3800 £3100 £3700 £3900 £3500 (i) Find the mean, median and mode of the data. Comment briefly on any substantial differences between these three measures. (ii) Find the standard deviation of the data. (iii) Explain whether the fee of £11 100 should be regarded as an outlier. In fact the school charging £11 100 is a small school for musically talented students.