Question 14.187

hotcoldtx

16. Hot and Cold in Texas. Is the weather in Texas on the hot side or the cold side? The following table shows the annual number of heating degree-days and cooling degree-days for a random sample of cities in Texas.17 Test, using the Wilcoxon signed rank test, whether the population median of the differences (heating degree-days minus cooling degree-days) is less than zero, using level of significance .

City Heating
degree-days
Cooling
degree-days
Austin 1648 2974
College Station 1616 2938
Dallas 2219 2878
El Paso 2543 2254
Houston 1174 3179
Killeen 2190 2477
San Antonio 1573 3038