For the Following Question(s): a Researcher Is Interested in Whether

Multiple Choice

For the following question(s) : A researcher is interested in whether the color of an animal's surroundings affects learning rate. She tests 16 rats in a box with colorful wallpaper. Assume that it is known that the average rat can learn to run this particular maze (in a box without any special coloring) in 25 trials, with a variance of 64; the distribution is normal. The mean number of trials to learn the maze for the group with the colorful wallpaper is 11.
-What is the null hypothesis?

A) The rate of learning for the sample of rats tested with colorful wallpaper is no different than the population of rats tested under ordinary circumstances.
B) The rate of learning for the sample of rats tested with colorful wallpaper is faster than the population of rats tested under ordinary circumstances.
C) The rate of learning for the population of rats tested with colorful wallpaper is no different than the population of rats tested under ordinary circumstances.
D) The rate of learning for the population of rats tested with colorful wallpaper is faster than the population of rats tested under ordinary circumstances.