The range. A Learning Object produced by Sidney Tyrrell, Coventry University, as part of her National Teaching Fellowship project. The range is the difference between the largest and smallest values. For the data set 4 4 4 the range is 0 For the data set 0 4 8 the range is 8-0=8 The range is the difference between the largest and smallest values. For the data set -92 4 100 the range is 100-(-92) = 100 + 92 = 192 The range: a warning • It is easy to calculate, but • because it is found from the extreme values it may not be helpful, • and may give quite the wrong idea about the data. The wrong idea? • Most people taking A levels are aged 16 to18. • The range of ages is at least 60 years; the the youngest being 9. • How helpful is the range in giving you a general idea of the spread of this data? Finally a reminder • Why measure spread? • Finding the spread helps us understand our data better; • which should lead to better decisions and analysis.
Pages to are hidden for
"The range"Please download to view full document