Question: Gino Vanelli, the manager of the Read and Feed chain of restaurants, wishes to investigate promotional ideas for the Liver and Biscuit dinners. One of his ideas is to hang posters that picture the item in the restaurant. To test the effectiveness of this idea he randomly selected eight restaurants to feature the poster and he randomly selected another eight that did not use the poster. The data for both groups are listed below. At the .10 significance level is there a difference in the variation of displaying or not displaying posters. F Distribution Comparing Two Sample Variances

With Posters Without Posters