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An International Journal for Teachers |
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Correlation: From Picture to Formula p 67 Peter Holmes
Correlation is introduced intuitively early in the school curriculum by considering
patterns in scatter diagrams. Later on, various formulae are used for calculating
correlation coefficients. This article suggests ways in which the formulae
can be related to the scatter diagrams.
Lewis Carroll's Obtuse Problem p 72 Ruma Falk and
Ester Samuel-Cahn
Carroll's apparently impeccable solution to one of his probability problems
is shown to answer another problem that is based on reasonable assumptions.
His original assumptions, however, are self contradictory, hence entailing
paradoxical results.
Count us in p 75 Alison Davies
A poem to mark the work of CensusAtSchool.
A Cautionary Note Concerning the Cox and Stuart Test p. 76
David L Farnworth
A homework assignment led to the observation that the Cox and Stuart test
is not symmetric under the transposition of the two variables. Examples of
this feature are presented.
BOOK REVIEW
Statistics Handbook for the TI-83 by Larry Morgan p 80
Reviewed by Barrie Gilpin
Musical Means: Using Songs in Teaching Statistics p. 81 Lawrence
M Lesser
Songs offer fresh motivations for probability and statistics.
Quartiles for Discrete Data p. 87 A H Joarder and M Firozzaman
Different methods for finding quartiles for discrete data that are available
in the literature are examined in the light of a desirable property that quartiles
divide the ordered sample observations into fur segments having the same number
of observations in each segment. A set of formulae that satisfy this property
is proposed and illustrated with examples.
Some Misconceptions about Attribute Sampling Plans p 90 Steve H
K Ng
This article explores some common potential misconceptions about sampling
plans. Use of the operating characteristic curve easily enables the misconception
to be overcome.
Beer tasting and the Problem of Coincidences p. 94 Paul Murrell
This article describes a matching problem. Given k unlabelled
items and k labels, how hard is it to correctly match the labels to
the items? The problem is an example of a very old one known as the
problem of coincidences, which was originally motivated by a
game played in the 18th century.
Prize Competition Report (96) Look Ahead (96) Index to Volume 23 (Inside back cover)
IASE Matters (centre fold)
Please email: alison.davies2@ntu.ac.uk with any comments or corrections.
©
The Teaching Statistics Trust 2006. The Teaching Statistics Trust is a registered
charity.
ISSN 0141-982X (Print) ISSN 1467-9639 (Online)