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 shape of the distribution of means?

A) rectangular
B) normal
C) not rectangular, but flatter than a normal curve
D) it cannot be determined from the information given