To determine how many stores had at least 7 shoppers, we need to consider the intervals on the histogram that represent 7 or more shoppers.
According to the provided data:
- For the range of 1 to 4 shoppers, there are 2 stores.
- For the range of 4 to 7 shoppers, there are 5 stores.
- For the range of 7 to 10 shoppers, there are 2 stores.
- For the range of 10 to 13 shoppers, there are 4 stores.
Now we add up the stores with at least 7 shoppers:
- 7 to 10 shoppers: 2 stores
- 10 to 13 shoppers: 4 stores
Adding these together gives:
2 (stores with 7 to 10 shoppers) + 4 (stores with 10 to 13 shoppers) = 6 stores
Therefore, the total number of stores that had at least 7 shoppers is 6 stores.