ABSTRACT
Three nonparametric tests are described in this chapter for which there are roughly equivalent t tests, as indicated in Table 11.1.
Suppose we collect the weekly incomes (£) of a random sample of 10 self-employed window cleaners:
200 550 290 170 180 350 190 210 160 250
162 ■ Essential Statistics
Let’s suppose that we are interested in testing a hypothesis concerning some average value of the weekly incomes of self-employed window cleaners.
