CAIE Further Paper 4 2022 June — Question 5

Exam BoardCAIE
ModuleFurther Paper 4 (Further Paper 4)
Year2022
SessionJune
TopicNon-parametric tests

5 A manager claims that the lengths of the rubber tubes that his company produces have a median of 5.50 cm . The lengths, in cm , of a random sample of 11 tubes produced by this company are as follows.
5.565.455.475.585.545.525.605.355.595.51
It is required to test at the \(10 \%\) significance level the null hypothesis that the population median length is 5.50 cm against the alternative hypothesis that the population median length is not equal to 5.50 cm . Show that both a sign test and a Wilcoxon signed-rank test give the same conclusion and state this conclusion.