For the purpose of t-testing data sets, use your original idea and formulate a null and alternate hypothesis about a particular specific research question.
Example:
Idea: I think the Weather Channel is lying to me by making the weather predictions seem more favorable than the actual weather turns out to be. I think the actual temperature is hotter than predicted.
Research Question: How does the weather on the actual day compare to the prediction for that day?
Is there a statistically significant difference between the predicted temperature, a week in advance, and the actual temperature for that day?
Ho: There is no statistically significant difference between the temperature that is predicted, and the actual temperature.
Ha: The actual temperature on the days recorded in our data set were higher than predicted.
Include all the highlighted items in your submission.