Psychology experiments sometimes involve testing the ability of rats to navigate
ID: 3058172 • Letter: P
Question
Psychology experiments sometimes involve testing the ability of rats to navigate mazes. The mazes are classified according to difficulty, as measured by the mean length of time it takes to find the food at the end. One researcher needs a maze that will take rats an average of one minute to solve. He tests one maze on 18 rats. Is there evidence that this maze is "too easy" or "too difficult" (implying taking something other than one minute to solve, on average)? Suppose the population standard deviation (X ), is 2 seconds. Time (in seconds): 38.4, 46.2, 62.5, 38, 62.8, 33.9, 50.4, 35, 52.8, 60.1, 55.1, 57.6, 55.5, 49.5, 44.3, 69.2, 56.3, 46.2
1. Give one reason why the time to complete this maze of these 18 rats might be representative of the time to complete this maze for all rats that may do this maze. Also, give one reason why the times of these 18 rats may not be representative of times for all rats that do this maze.
Explanation / Answer
Psychology experiments sometimes involve testing the ability of rats to navigate mazes. The mazes are classified according to difficulty, as measured by the mean length of time it takes to find the food at the end. One researcher needs a maze that will take rats an average of one minute to solve. He tests one maze on 18 rats. Is there evidence that this maze is "too easy" or "too difficult" (implying taking something other than one minute to solve, on average)? Suppose the population standard deviation (X ), is 2 seconds. Time (in seconds): 38.4, 46.2, 62.5, 38, 62.8, 33.9, 50.4, 35, 52.8, 60.1, 55.1, 57.6, 55.5, 49.5, 44.3, 69.2, 56.3, 46.2
1. Give one reason why the time to complete this maze of these 18 rats might be representative of the time to complete this maze for all rats that may do this maze. Also, give one reason why the times of these 18 rats may not be representative of times for all rats that do this maze.
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