Final answer:
To predict the mean cost per person for a restaurant with a summated rating of 40, we need more information.
Step-by-step explanation:
To predict the mean cost per person for a restaurant with a summated rating of 40, we need more information. A summated rating is a measure of overall satisfaction that is usually based on a scale or rating system. It is not directly related to the cost per person at a restaurant.
In order to predict the mean cost per person, we would need data on previous restaurant visits, the cost per person during those visits, and the corresponding summated ratings. Without this information, we cannot accurately predict the mean cost per person for a restaurant with a summated rating of 40.