A garment factory produces 9 000 shirts daily. Upon examining a sample of 500 shirts, 18 defective ones were found. Evaluate the number of non-defective shirts that can be found in a daily production.
Step 1: Use the sample to find the probability that a shirt is non-defective.
Divide the number of non-defective units in the sample by the number of units in the sample.
Step 2: Find the expected number of non-defective units in a daily production.
Multiply the total number of units produced in a day by the probability that a unit is non-defective.