A student is trying to decide which foreign language to take and wants to know w

Question

A student is trying to decide which foreign language to take and wants to know which one will be most pleasant for her friends and family to listen to her speak. Luckily, she is in a research methods course and is able to carry out an experiment to systematically study this question. She randomly assigns participants to listen to one of four different languages and then rate how they feel afterward on a scale from 1 to 10, with 10 indicating very pleasant. Assume a two-tailed test, with significance set at .05.

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a) What is the null hypothesis?

b) What is the alternative hypothesis?

c) What is the independent variable and the levels of the IV?

d) What is the dependent variable?

e) What is the scale of measurement? (nominal, interval, ratio, etc.)

German 8 7 7 6 8 7 7 8 French 6 7 7 7 7 6 7 5 Spanish 6 6 7 7 8 7 7 6 Japanese 7 6 7 7 8 7 7

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Explanation / Answer

a) The null hypothesis: Foreign languages do not differ significantly in terms of their pleasantness to hear.

b) The alternative hypothesis: Foreign languages differ significantly in terms of their pleasantness to hear.

c) The independent variable is foreign languages. There are 4 levels: German, French, Spanish and Japanese.

d) The dependent variable is pleasantness to hear.

e) The scale of measurement for the IV: Nominal. The scale of measurement for the DV: Interval.

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