Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the mean level number when the example name is lower snake and the approximate number is hus is less than 370?

### Inputs:
table_name: table, columns: ['Name', 'Level', 'Digits', 'Average size (square miles)', 'Number of HUs (approximate)', 'Example name', 'Example code (HUC)']

### Response:
SELECT AVG Level FROM table WHERE Example name = lower snake AND Number of HUs (approximate) < 370