The correct answer is 12in/1ft because there are 12in in 1ft
i assume the line plot is the % difference, the original 95% vs 92% has a difference of 3%,
the 10 random values center around 3% and 3% has the most occurrences of the 10.
the average value for the 10 is 2.9%, so that is within .1 of the original 3%
so it should be significant, not sure what criteria you are supposed to use?
is there a p or z test involved?
Hope this helps!
The answer to this question is 650m.
Walking trails AC and BD represent the diagonals of the parallelogram ABCD. As known the diagonals of the parallelogram bisects each other.
Then
Since DE=BE, then
y+2=3y-4,
2y=6,
y=3.
And BD = y+2+3y-4=3+2+9-4=10 miles.
Since y=3 miles and AE=CE, then
AC=2CE=2(2y-3)=2(6-3)=6 miles.
The sum of the lengths of the two trails is
AC+Bd=10+6=16 miles.
Answer: correct choice is C