You are in the distribution yard where items are being prepared for packaging and shipping. However, before these items are sent, a final quality
control check is required.
From experience, it is determined that 15% of the items will not pass quality control.
You check the next 50 items. Of these, 16 are determined to be "bad." Is this unusually
high ? Use the mean and standard deviation to make your argument. Assume that one
item's condition has nothing to do with another's