The Beginning of Statistical Inference: Comparing two Data Sets
 Jane M. Watson,
 Jonathan B. Moritz
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The development of school students' understanding of comparing two data sets is explored through responses of students in individual interview settings. Eightyeight students in grades 3 to 9 were presented with data sets in graphical form for comparison. Student responses were analysed according to a developmental cycle which was repeated in two contexts: one where the numbers of values in the data sets were the same and the other where they were different. Strategies observed within the developmental cycles were visual, numerical, or a combination of the two. The correctness of outcomes associated with using and combining these strategies varied depending upon the task and the developmental level of the response. Implications for teachers, educational planners and researchers are discussed in relation to the beginning of statistical inference during the school years.
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 Title
 The Beginning of Statistical Inference: Comparing two Data Sets
 Journal

Educational Studies in Mathematics
Volume 37, Issue 2 , pp 145168
 Cover Date
 19981101
 DOI
 10.1023/A:1003594832397
 Print ISSN
 00131954
 Online ISSN
 15730816
 Publisher
 Kluwer Academic Publishers
 Additional Links
 Authors

 Jane M. Watson ^{(1)}
 Jonathan B. Moritz ^{(1)}
 Author Affiliations

 1. Department of Early Childhood/Primary Education, University of Tasmania, GPO Box 252–66, Hobart, Tasmania, 7001, Australia; Email