In an experiment to assess the strength of the hunger drive in rats, 20 previously trained...
In an experiment to assess the strength of the hunger drive in rats, 20 previously trained animals were deprived of food for 24 hours. At the end of the 24-hour period, each animal was put into a cage where food was dispersed the animal pressed a lever. The length of time the animal continued pressing the bar (although receiving no food) was recorded for each animal. The data yielded a sample mean of 19.3 minutes with a standard deviation of 5.4 minutes (a) Estimate the true mean time (in min). (Round your answer to three decimal places.) (b) Calculate the 95% margin of error in min). (Round your answer to three decimal places.) min