Assume you had:

a. A tall ladder with a sticker that listed a weight allowance only 5 pounds more than you weighed. You know the manufacturer and model number.

b. Perishable food with an expiration date 2 days into the future.

c. A checking account balance that indicated you had sufficient funds to cover the balance due on an account. 

In all three cases, you cannot trust the data to be exactly correct. The data could be incorrect by about 20 percent. How might you find the correct data for each instance? Which data might not be possible to verify? How does dirty data impact your decision making?