Answer:
n=2
Step-by-step explanation:the line where it says 4n will always be half of the 16 line and 8 is half 16 so 4(2)=8
In a normal distribution, the median is the same as the mean (25.3). The first quartile is the value of

such that

You have

For the standard normal distribution, the first quartile is about

, and by symmetry the third quartile would be

. In terms of the MCAT score distribution, these values are


The interquartile range (IQR) is just the difference between the two quartiles, so the IQR is about 8.8.
The central 80% of the scores have z-scores

such that

That leaves 10% on either side of this range, which means

You have

Converting to MCAT scores,


So the interval that contains the central 80% is

(give or take).
Answer:
15.59 un²
Step-by-step explanation:
18 ÷ 3 = 6
15.59 un²
I googled it and the answer is 1,800 miles