There are 7 employees in a restaurant, and the wages of all the personnel are shown in the following

(1) The average salary of all employees in a restaurant is 1

7 (3000 + 1200 + 1000 + 800 + 600 + 600 + 570) = 1110 (yuan);

2) Observing the chart, it can be seen that the wages of all employees are arranged from high to low, and the middle number is 800, so the median salary of all employees is 800 (yuan);

3) According to the analysis, it is appropriate to use the median to describe the general level of wages of the staff in the restaurant;

4) After removing the manager's salary, the average salary of other employees is 795 yuan, which can reflect the general level of the salary of the restaurant employees

So the answer is: 1110; 800；Median; 795, can