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

Question

Quizplus · Accepted Answer

The standard deviation of the distribution of means can be calculated using the formula: standard deviation = square root of (variance/sample size). In this case, the variance is known to be 64 and the sample size is 16. Therefore, the standard deviation of the distribution of means is the square root of (64/16), which is 2.00. Choice B is the correct answer.

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