PLZ HELP ASAP The numbers of motor vehicle fatalities in the United States for the years 2010 and 2011 are listed in the table b
elow. Which conclusion is true based on the mean fatalities for the two years?
Month 2010 2011
January 2,290 2,365
February 2,016 2,912
March 2,423 3,011
April 2,777 2,638
May 2,934 2,459
June 2,795 2,154
July 3,095 2,268
August 3,083 2,750
September3,024 2,545
October 3,056 2,323
November 2,795 2,741
December 2,597 2,912
A.The variability in the monthly fatalities in 2011 is generally higher than in 2010.
B.The variability in the monthly fatalities in 2010 is equal to the variability in 2011.
C.The monthly fatalities in 2011 are generally higher than in 2010.
D.The monthly fatalities in 2010 are generally higher than in 2011.
E.The monthly fatalities in 2010 are approximately the same as in 2011.
Month 2010 2011
January 2,290 2,365
February 2,016 2,912
March 2,423 3,011
April 2,777 2,638
May 2,934 2,459
June 2,795 2,154
July 3,095 2,268
August 3,083 2,750
September3,024 2,545
October 3,056 2,323
November 2,795 2,741
December 2,597 2,912
A.The variability in the monthly fatalities in 2011 is generally higher than in 2010.
B.The variability in the monthly fatalities in 2010 is equal to the variability in 2011.
C.The monthly fatalities in 2011 are generally higher than in 2010.
D.The monthly fatalities in 2010 are generally higher than in 2011.
E.The monthly fatalities in 2010 are approximately the same as in 2011.
1 answer:
To find which measure of variability is greater and which average number of monthly fatalities is higher, you will need to calculate the mean and the mean absolute deviation for both years
The mean will tell us which is generally higher, and the mean absolute deviation will tell us which has a greater variability.
The correct answer is D.
Please see the attached picture for the work.
The mean will tell us which is generally higher, and the mean absolute deviation will tell us which has a greater variability.
The correct answer is D.
Please see the attached picture for the work.
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Answer:
The ballonist is at a height of 3579.91 ft above the ground at 3:30pm.
Step-by-step explanation:
Let's call:
h the height of the ballonist above the ground,
a the distance between the two observers,
the horizontal distance between the first observer and the ballonist
the horizontal distance between the second observer and the ballonist
and
the angles of elevation meassured by each observer
S the area of the triangle formed with the observers and the ballonist
So, the area of a triangle is the length of its base times its height.
(equation 1)
but we can divide the triangle in two right triangles using the height line. So the total area will be equal to the addition of each individual area.
(equation 2)
But we can write in terms of
, like this:
And for will be the same:
Replacing in the equation 2:
And replacing in the equation 1:
So, we can replace all the known data in the last equation:
Then, the ballonist is at a height of 3579.91 ft above the ground at 3:30pm.
