Contents of 23-3
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)