CityPopulation"Fire/EMS spending per resident""Fire/EMS personnel per 1000 residents"# of fire personnelBoston608,352$452.153.42068San Francisco799,183$315.812.21758Columbus, OH747,755$255.702.11570Seattle594,210$247.751.81070Baltimore637,455$225.982.71721Memphis674,028$220.222.51685Detroit916,952$201.541.61467Nashville590,807$194.431.91123Philadelphia1,449,634$187.631.62319Jacksonville805,605$179.991.51208New York8,274,527$157.561.714067Los Angeles3,834,340$137.800.93451a) what is the mean population of the twelve cities for which data are presented?b) what is the median population of the 12 cities for which data are presented?e) what percent of the U.S. population lives in these 12 cities?

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Answered: City Population "Fire/EMS spending…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.2: Representing Data

Problem 22PFA

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City	Population	"Fire/EMS spending per resident"	"Fire/EMS personnel per 1000 residents"	# of fire personnel
Boston	608,352	$452.15	3.4	2068
San Francisco	799,183	$315.81	2.2	1758
Columbus, OH	747,755	$255.70	2.1	1570
Seattle	594,210	$247.75	1.8	1070
Baltimore	637,455	$225.98	2.7	1721
Memphis	674,028	$220.22	2.5	1685
Detroit	916,952	$201.54	1.6	1467
Nashville	590,807	$194.43	1.9	1123
Philadelphia	1,449,634	$187.63	1.6	2319
Jacksonville	805,605	$179.99	1.5	1208
New York	8,274,527	$157.56	1.7	14067
Los Angeles	3,834,340	$137.80	0.9	3451

a) what is the mean population of the twelve cities for which data are presented?

b) what is the median population of the 12 cities for which data are presented?

e) what percent of the U.S. population lives in these 12 cities?

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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