Tiffany answered 32 questions correctly since 32/40 is .80
Answer: C. 25
Step-by-step explanation:
Given : The average rat (of this strain) can learn to run this type of maze in a box without any special coloring : 
The mean number of trials to learn the maze, for the rats tested with the colorful wallpaper= 
We know that the sampling distribution D is given by :-

Similarly the mean of the distribution M in the given situation is given by :_

Answer:
this is right
Step-by-step explanation:
i just took the test and it was B!
Answer:
though this looks difficult. It's easier than you think. Just not visible until its visible. If I knew the answer, i would have told you... sorry.
I think that the answer is C the equation is true.