From 74 of its restaurants, Noodles & Company managers collected data on per-person sales and the percent of sales due to "potstickers" (a popular food item). Both numerical variables failed tests for normality, so they tried a chi-square test. Each variable was converted into ordinal categories (low, medium, high) using cutoff points that produced roughly equal group sizes. Research question: At α = .05, is per-person spending independent of percent of sales from potstickers?
Answer to relevant QuestionsA web-based anonymous survey of students asked for a self-rating on proficiency in a language other than English and the student's frequency of newspaper reading. Research question: At α = .10, is frequency of newspaper ...In a study of childhood asthma, 4,317 observations were collected on education and smoking during pregnancy, shown in the 4 × 3 contingency table below. Research question: At α = .005, is smoking during pregnancy ...Prof. Green's multiple-choice exam had 50 questions with the distribution of correct answers shown below. Research question: At α = .05, can you reject the hypothesis that Green's exam answers came from a uniform ...In 2002, the Anaheim Angels defeated the San Francisco Giants in the World Series 4 games to 3. The table below shows the inning-by-inning breakdown of runs by each team (3 indicates unnecessary last half of inning). (a) ...Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group. (a) Make a bar chart and describe it. (b) Calculate expected frequencies for each ...
Post your question