Identify the proof to show that △LMQ≅△NPQ, where Q is the midpoint of LN¯¯¯¯¯ and MP¯¯¯¯¯¯, ∠L≅∠N, and LM¯¯¯¯¯¯≅NP¯¯¯¯¯¯. The figure shows two triangles L M Q and N P Q. The triangles have a common vertex Q. Points L, Q, N lie on one line. Points M, Q, P lie on one line.

The sample is from the right population, his customers. However, because he is surveying such a small number of people and only asking his best customers (who are probably the most satisfied, or they would not buy so much from him), the results are going to be biased, most likely positive, and not representative of his entire customer base.