Final answer:
The false statement about appraisal is that an appraiser doesn't need to understand the type of interest being appraised. For price floor impact, setting it substantially above the equilibrium price maximizes effect. Imperfect information makes price agreement difficult due to potential valuation misalignments.
Step-by-step explanation:
The statement regarding appraisal that is false is (c) "An appraiser need not understand the type of interest to be determined as long as he uses the correct appraisal method". An appraiser must indeed understand the type of interest being appraised to accurately determine the value. The sale price does reflect the buyer's and seller's limits in a general sense, form reports are common for mortgage financing, and appraisals are indeed tied to a specific date.
When it comes to the effect of a price floor, the most accurate statement is that a price floor will have the largest effect if it is set (a) substantially above the equilibrium price. This is because it would impose a constraint that is much higher than what the market would naturally set, leading to possible surpluses as sellers could not legally sell below that price floor even if buyers are not willing to pay that much.
Concerning the difficulty in agreeing on a price with imperfect information, it's due to the lack of information that may cause misunderstandings or misrepresentations of the product's value, leading to mistrust or a mismatch in the valuation of the product to buy or sell.