Most water parks use a recycling system so that the only water loss is due to evaporation and splashing. Despite a sophisticated recycling system, the Schlitterbahn Waterpark in New Braunfels, Texas, has informed the city water department of their need for 250,000 gallons of water per day. The city water department selected a random sample of 21 days, and the park's water usage (in thousands of gallons) on each day. The sample produced the following data; x = 245.2 and s = 40.8. Is there evidence to suggest that the mean water usage is different from 250,000 gallons? Use = 0.01 and assume the underlying population is normal.