To find the temperatures, log on to the Internet and Netscape, then go to the National Weather Service information provided by the University of Michigan Weather Underground by clicking on the bookmark called Weather Conditions for SEA. Once there, scroll down until you reach the temperature, humidity, wind, air pressure, and weather for Galveston. Note the time that these recordings were taken. It is important that the readings for the next 2 weeks be taken at the same time in all three cities.
To get to the next city, scroll to the searchable index box and type in the 3 letter airport code for that city. Galveston is gls, Houston is hou and Dallas is dal. If you don't know this code, the index will accept the full city name, go to that location, and then tell you the code for future reference.
At the end of two weeks, students divide into 3 groups, one for each city; and find the mean, standard deviation, and percentage error of their city's temperatures. If the hypothesis is true, Galveston should have the most consistent temperatures, followed by Houston and then Dallas. Discuss the effect consistent and inconsistent weather has on a city. Possibly affected industries would be housing, tourism, retail clothing, landscaping, and public utilities. In closing the lesson remind the students that mathematics and specifically statistics ARE good for something, and this is just one of many examples!