A company has been receiving complaints about the attitude of some sales clerk

A company has been receiving complaints about the attitude of some sales clerks. Over a 10-day period the total number of complaints was 360.
The company wishes to develop a control chart for the number of complaints. What would the upper control limit on the number of complaints per day be for a 3
sigma (99.7%) control chart?
18 36 42 54 None of these A company has been receiving complaints about the attitude of some sales clerks. Over a
10-day period the total number of complaints was 360. The company wishes to develop a control chart for the number of complaints. What would the upper
control limit on the number of complaints per day be for a 2 sigma (95.5%) control chart? 12 42 48 54 None of these A company has been receiving complaints about the attitude of some sales clerks. Over a 10-day period the total
number of complaints was 250. The company wishes to develop a control chart for the number of complaints. What would the lower control
limit on the number of complaints per day be for a 2 sigma (95.5%) control chart? 20 0 15 10 202.6