The author conducted a study of the accuracy of weather forecasts by recording the actual high temperatures along with the high temperatures that were forecast 5 days earlier. Differences (actual minus forecast) for 35 days are listed be¬low. Use α 0.05 significance level with the sign test to test the claim that the population of dif¬ferences has a median of zero. What do the results suggest about the accuracy of the forecasts?

Use a 0.05 significance level with the indicated test. If no particular test is specified, use the appropriate nonparametric test from this chapter.

Transcribed Image Text:

0 -3 2 5 6-94-1 622-1 64 3 012 -14-1 3 9 6-3 3 54-7-6-71 0-110-6