Answer:
37
Step-by-step explanation:
The naïve technique of forecasting is a simple forecasting technique that is used among time series data. in this type of forecasting, we use the actual figure in the last period to make a forecast for the next period that follows it.
In this question, the last day is day 6, and the number of customer on this day is 37. With the explanation in the paragraph above, the forecast for day 7 is still going to be 37 customers, given that day 7 follows day 6, which was the last period.