1. Dave Hughes owns a local restaurant. He wonders if a redesign of the menu wil

Question

1. Dave Hughes owns a local restaurant. He wonders if a redesign of the menu will increase, on average, the amount customers spend when visiting his establishment. For the following scenarios, pick a statistical method we discussed regarding comparing two groups that would be appropriate for analyzing the problem.

A. Hughes records the means sales the week before the change and the week after the change and then wonders whether the difference is statistically significant.

B. Hughes randomly samples 100 people and shows both menus to each person, asking them to rate each menu from 0 (very poor) to 20 (excellent).

C. Hughes randomly samples 100 people and randomly separates them into two groups of 50. He asks those in group 1 to give a rating of ‘positive’ or ‘negative’ to the old menu and those in group 2 to give a rating of ‘positive’ or ‘negative’ to the new menu.

Explanation / Answer

The likelihood that a result or relationship is caused by something other than mere random chance to test that Statistical hypothes is testing is traditionally employed to determine if a result is statistically significant or not.

As option A says that he will check whether the difference is statistically significant, it means he should use A.

Answer is A. Hughes records the means sales the week before the change and the week after the change and then wonders whether the difference is statistically significant.

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