Forgive me if I've got the 'wrong-end-of-the-stick' here but I am always cautious about using categorical variables (especially those with few 'categories') in interactive effects.
In the illustration used here, it…"
Started as an Analytical Chemist who was faced with ever increasing quantities of complex data for products and services. Took an interest in investigating this data to reveal increasingly complex reliance and interactions and so became a data-analyst as a consequence. Subsequently applied this to business data including forensic intelligence and higher education student satisfaction.
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