Does the brand name of an ice cream affect consumers' perception of it? Mary, the marketing manager of a major dairy, always feel domestic ice-creams taste better and fresher. She decided to ask 25 randomly selected people to taste the same flavour of ice cream in two different dishes. The dishes contained exactly the same ice cream but were labelled differently. Once was given a name that suggested that its maker was European and sophisticated; the other was given a name that implied that the product was domestic and inexpensive. The tasters were asked to rate each ice cream on a 1-5 scale, where 1 is the worst and 5 is the best.

(a)What is the scale of the data? [1]

(b)Which non-parametric test should Mary conduct so that she can answer the question "Do the results allow her to conclude, at the 5% significance level, that the ice cream labelled as domestic is preferred?" Briefly explain. [2]

Conduct the non-parametric test of your choice and make conclusion.

\f