An experiment has been conducted to compare the ease of use of several pocket calculators, with subjects randomly provided with one of four calculator designs. The subjects have been coded according to which one of the four calculators they tried (codes = 1–4) and whether they thought the calculator was “easy to use” (1 = easy to use, 2 = not easy to use). The data are in file XR13050. At the 0.01 level of significance, test whether the calculators could be equally easy to use.
A computer and statistical software.