A store manager wants to investigate customer spending in his store. He randomly selects 30 customers and records their purchase total. He finds the mean to be $125 and the standard deviation to be $32. Construct and interpret a 95% confidence interval for the true mean purchase total for all customers. Is the Random condition met? Check all true statements.

a. The store manager randomly selects 30 customers.
b. The store manager randomly selects 30 stores.
c. The store manager randomly assigns the customer to treatment groups.
d. The Random condition is met.
e. The Random condition is not met.