A researcher is investigating different types of customers for a sporting goods store. In a survey, respondents have indicated how much they exercise in approximate minutes per week. These respondents have also rated the performance of the sporting goods store across 12 different characteristics such as good value for the price, convenience of location, helpfulness of the sales clerks, etc.
The researcher used a 1-7 rating scale for these 12 characteristics where 1 = poor performance and 7 = excellent performance. How can the researcher investigate differences in the ratings based on the amount of exercise reported by the respondents?