Bumble followed up with his data collection and gathered a new dataset of measures around sales at his grocery store per customer per visit, combining both observations and customer survey, listed in file Final Exam.xlsx *Throughout the final exam, use portions of this same dataset as specified in each problem. The variables are spending (USS), duration of shopping (minutes), age (years) gender (0 = male, 1 = female), travel time to store (minutes), dietary preference (regular, low-fat, or low-carb), and store membership (yes/no) for each of the 30 customers that he sampled and tracked. First, he wants to understand the population (true) average amount of spending (S) per customer per visit for all his customers. 1-1 What is his point estimation of the population mean spending? (select from the dropdown)