Research Done in the Mid 1980s Indicated That 80% of Grizzly

Short Answer

Research done in the mid 1980s indicated that 80% of grizzly bears in the greater ecosystem of Yellowstone National Park entered their den for hibernation by the last day of November. This has come into question as of late. Researchers have hypothesized that climate change has postponed bears entering hibernation until later in the season; that is, researchers believe that a smaller percentage of bears are entering their den for hibernation by the last day of November. Sixty-two Yellowstone grizzly bears were tracked via radio monitors, which allow scientists to pinpoint when the bears enter their dens with a high degree of accuracy. Of the sixty-two Yellowstone grizzly bears being tracked, forty-two entered their den for hibernation by the last day of November.
-Identify which of the following is the null hypothesis, and which is the alternative hypothesis:
_____The sample proportion of 62 Yellowstone grizzly bears that enter their den for hibernation by the last day of November is 0.80.
_____The long-run proportion of Yellowstone grizzly bears that enter their den for hibernation by the last day of November is 0.80.
_____ The long-run proportion of Yellowstone grizzly bears that enter their den for hibernation by the last day of November is less than 0.80.
_____ The long-run proportion of Yellowstone grizzly bears that enter their den for hibernation by the last day of November is greater than 0.80.