Question: From long experience, the store manager at a local W-mart store knows that the

number of customers in the store each day follows a normal distribution with a

mean of 610 customers and a standard deviation of 36 customers. The table

below provides the number of customers in the store each day for the past 10

days. t = number of the day and x = number of customers.

a. Construct a Control Chart for the daily number of customers at the W-mart store.

b. Determine whether the distribution of customers is in statistical control. If it is not, determine (and label) which out-of-control signals are present.