Question

PLZ HELP ASAP The numbers of motor vehicle fatalities in the United States for the years 2010 and 2011 are listed in the table below. 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.

Answer 1

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.

Answer 2

The monthly fatalities in 2010 are generally higher than in 2011.

What is the mean of a set of numbers?

Mean is a measure of central tendency.  It is the average of a set of numbers. It is determined by adding the numbers together and dividing it by the total number.

Mean = sum of the numbers / total number

Mean number of fatalities in 2010 = (2290 + 2016 + 2423 + 2777+ 2934 + 2795 + 3095 + 2083 + 3024 + 3056 + 2795 + 2597) / 12 = 2740.42

Mean number of fatalities in 2011 = (2365 + 2912 + 3011 + 2638 + 2459 + 2154 + 2268 + 2750 + 2545 + 2323 + 2741 + 2912) / 12 = 2589.83

To learn more about mean, please check: https://brainly.com/question/25842202