Sandy James thinks housing prices stabilized past months. To convince boss, intends compare current prices year prices. She collected 12 housing prices adds: 125,900, 253,000, 146,950, 121,450, 135,450, 175,000, 200,000, 210,950, 166,700, 185,000, 191,950. She then calculates the mean and standard deviation of the prices she has found. What are these two summary values?