1. An organizational specialist is hired as a consultant to a company planning to open a coffee house for college students. The company wants to know if the customers will drink more coffee if the coffee house is decorated in a Paris motif or in a San Francisco motif. To test this, the researcher sets up two similar rooms, but with the two different motifs. She then arranges to have eight students spend an afternoon in each room while being allowed to drink all the coffee they like. (The order in which they sit in the rooms is rotated, so that half do their first afternoon in the Paris room and half in the San Francisco room.) The amount each student drinks is recorded below: Cups of Coffee Consumed for each Motif San Francisco 8.4 Participant A B D E F G H Paris 8.5 4.3 2.0 7.8 7.0 9.1 3.3 4.6 1.7 7.3 7.2 7.4 3.0 3.5 3.5 Is there a significant difference between the numbers of cups of coffee consumed in the two rooms? (a) Define the parameter of interest and state the null and research hypotheses. [2 marks] (b) What is the comparison distribution for this test? (1 mark] (c) What are the cut-off values for this test with a significance level of 0.05? [1 mark] (d) What is the observed t score? [Show workings] [2 marks] (e) Test your hypotheses and state your conclusions. [1 mark] (f) What is the effect size of the study? [1 mark] 1. An organizational specialist is hired as a consultant to a company planning to open a coffee house for college students. The company wants to know if the customers will drink more coffee if the coffee house is decorated in a Paris motif or in a San Francisco motif. To test this, the researcher sets up two similar rooms, but with the two different motifs. She then arranges to have eight students spend an afternoon in each room while being allowed to drink all the coffee they like. (The order in which they sit in the rooms is rotated, so that half do their first afternoon in the Paris room and half in the San Francisco room.) The amount each student drinks is recorded below: Cups of Coffee Consumed for each Motif San Francisco 8.4 Participant A B D E F G H Paris 8.5 4.3 2.0 7.8 7.0 9.1 3.3 4.6 1.7 7.3 7.2 7.4 3.0 3.5 3.5 Is there a significant difference between the numbers of cups of coffee consumed in the two rooms? (a) Define the parameter of interest and state the null and research hypotheses. [2 marks] (b) What is the comparison distribution for this test? (1 mark] (c) What are the cut-off values for this test with a significance level of 0.05? [1 mark] (d) What is the observed t score? [Show workings] [2 marks] (e) Test your hypotheses and state your conclusions. [1 mark] (f) What is the effect size of the study? [1 mark]
