The mean is $5.769 million and the standard deviation is $3.905 million.
<h3>What is the mean?</h3>
The mean is the average of a data set.
<h3>What is the standard deviation?</h3>
The standard deviation shows the measure of the dispersion from the mean.
<h3>Data and Calculations:</h3>
Urban Area Total Cost Squared Difference
(millions of dollars) (x - u)²
New York 16 104.65
Los Angeles 13 52.27
Chicago 7 1.51
Washington, D.C. 5 0.59
Houston 5 0.59
Dallas, Fort Worth 4 3.13
Detroit 4 3.13
Miami 4 3.13
Phoenix 4 3.13
Philadelphia 4 3.13
San Francisco 3 7.67
Boston 3 7.67
Atlanta 3 7.67
13 Total 75 198.27
Mean = 5.769 (75/13) 15.251 (198.27/13)
Standard Deviation = 3.905 (square root of 15.251)
<h3>Question Completion:</h3>
Urban Area Total Cost
(millions of dollars)
New York 16
Los Angeles 13
Chicago 7
Washington, D.C. 5
Houston 5
Dallas, Fort Worth 4
Detroit 4
Miami 4
Phoenix 4
Philadelphia 4
San Francisco 3
Boston 3
Atlanta 3
Calculate the mean and standard deviation for this data set (in millions of dollars). (Round your answers to three decimal places.) mean $ million standard deviation $ million
Thus, the mean is $5.769 million and the standard deviation is $3.905 million.
Learn more about calculating the mean and standard deviation at brainly.com/question/1580527
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CD=21
DE=16
CE=21#7:
(3x-4)+(9x+17)+(6x-31)=180 <- sum of angles in a triangle
18x-18x=180 <- Simplify
18x=198
x=11 now substitute, m<A=9*11+17, m<A=116
#8:
(10x-23)=(7x-26)+(5x-27) <- Exterior angle of triangle
10x-23=12x-53
x=30; substitute, m<A=30*5-27, m<A=123
#9:
m<R=74 <- Base angles therom
m<Q+74*2=180 <- Sum of angles in triangle
m<Q=32 <- Simplify
#10:
m<E=m<G <- Base angles therom
2m<E+106=180 <-Sum of angles in triangle
m<E=m<G=37
#11:
m<A=180-48*2
m<A=84
Triangle is isosceles so by base angles therom, AC=9 ft
#12
m<M=m<N=m<P=60 <- Triangle is equilateral
#13
2(8x-23)+34=180 <- Sum of angles in triangle
16x-12=180
16x=192
x=12
#14
3(9x-3)=180 <- Su, of angles in triangle
9x-3=60
9x=63
x=7
#15
4x+9=16x-27 <- Legs of isosceles triangle
12x=36
x=3
Now substitute
6.25 years, which would be about 6 years and 3 months.
