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 standard deviation of the distribution of means?

A) 64/16 = 4.00
B) square root of (64/16) = 2.00
C) 64/11 = 5.82
D) square root of (64/11) = 2.41