1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
xenn [34]
3 years ago
9

1898, L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that th

e number of soldiers killed by horse kicks each year in each corps in the Prussian cavalry followed a Poisson distribution with a mean of 0.61.
Required:
a. What is the probability of more than 1 death in a corps in a year?
b. What is the probability of no deaths in a corps over five years?
Mathematics
1 answer:
seropon [69]3 years ago
8 0

Answer: a. 0.1252

b. 0.04736

Step-by-step explanation:

Let X denotes a  the number of soldiers killed by horse kicks in a year such that it has a Poisson distribution with mean \lambda=0.61.

Poisson distribution formula:

P(x; \lambda) = \dfrac{(e^{-\lambda}) (\lambda^ x)}{  x!}

a.    P(X>1)=1-P(X\leq1)

=1- (P(X=0)+P(X=1))\\\\=1-( \dfrac{(e^{-0.61}) ((0.61)^0)}{  0!}+\dfrac{(e^{-0.61}) ((0.61)^1)}{  1!})\\\\= 1-( \dfrac{(0.54335) }{ 1}+\dfrac{(0.54335) (0.61)}{  1})\\\\\approx0.1252

Hence, the probability of more than 1 death in a corps in a year= 0.1252

b.  For five years, Mean = \mu =\lambda \times 5= 0.61\times5 =3.05

P(X=0)=e^{-3.05}\dfrac{3.05^0}{0!}

\\\\=(0.04736)\dfrac{1}{1}\approx0.04736

Hence,  the probability of no deaths in a corps over five years = 0.04736

You might be interested in
114°<br> 33°<br> Х<br> X<br> degrees
Bess [88]

Answer:

Step-by-step explanation:

180-114-33=180-x

33=180-x

-147=-x

x=147 degrees

6 0
2 years ago
What is the 4th term of the geometric sequence when the first term is 6 and the common ratio is 7?
RUDIKE [14]

Answer:

2,058

Step-by-step explanation:

first term :  a_1 = 6

common ratio   r = 7

a_n = (a_1) * r ^(n-1)

a_4 = 6 * 7^(4-1)

a_4 = 6 *7^3

a_4 = 6 * 343  = 2,058

5 0
3 years ago
!PLEASE HELP!!!!!!!!!!
DaniilM [7]
I would say 7 because if you divide 28\4 you get 7 and if you add 7 four times you get 28 for WY+XZ=28
8 0
2 years ago
Find the area of abc. round your answer to the nearest tenth. b=87, a = 10.1, c = 9.8
Advocard [28]
The area of the triangle can be calculated through the equation,
             A = sqrt ((s)(s - a)(s - b)(s - c))
where A is area, s is the semiperimeter ((a + b + c)/2), a, b, and c are the sides given above.

The presented equation above is the Heron's formula.

Substituting the known values,
             s = (8.7 + 10.1 + 9.8) / 2
              s = 14.3

    A = sqrt ((14.3)(14.3 - 8.7)(14.3 - 10.1)(14.3 - 9.8))
           <em>A = 38.9 units squared

</em>
Thus, the answer to this item is not among the choices. <em>
</em>
8 0
3 years ago
How do you find the sum of cube ?
SIZIF [17.4K]

Answer:

(2x+5)(4x^{2} -10x+25)=0

Step-by-step explanation:

Given:

The given equation is.

8x^{3} +125=0

Find the some of cube.

Solution:

8x^{3} +125=0

2^{3}x^{3} +5^{3}=0

(2x)^{3} +5^{3}=0----------(1)

The sum of the cube formula is given below.

(a^{3} +b^{3})=(a+b)(a^{2} -ab+b^{2} )-----------(2)

By comparing equation 1 and equation 2

a=2x, b=5

substitute a and b value in equation 2

((2x)^{3} +5^{3})=(2x+5)((2x)^{2} -(2x)(5)+5^{2})

((2x)^{3} +5^{3})=(2x+5)(4x^{2} -(10x)+25)

((2x)^{3} +5^{3})=(2x+5)(4x^{2} -10x+25)

Therefore the sum of the cube (2x+5)(4x^{2} -10x+25)=0

4 0
3 years ago
Other questions:
  • The line plot below shows the weights of ten eggs laid by one hen. What is the total weight, in ounces, of the four heaviest egg
    13·1 answer
  • For the linear equation above, y=1/2x-5, is the point (-14,-13) on this line? Explain how you know.
    13·1 answer
  • explain why the sine of x is the sample regardless of which triangle is used to find it in the figure
    15·1 answer
  • Averages woman's brain: 1 3/10 kg (kilograms), 2 8/10 lbs (pounds), Average human heart, 3/10 kg, 7/10 lbs, What Is the total we
    10·1 answer
  • How do you take a square, triangle, or circle to create 3d figures?
    7·1 answer
  • Please help me find the area of this figure! Thanks!!
    14·1 answer
  • .....................
    14·1 answer
  • Fourteen decreased by three times four
    13·2 answers
  • Can some one help it’s due tomorrow!!!!
    11·1 answer
  • In ​ΔDEF, the midpoint of the side opposite vertex D is M and the centroid is C. If DM is 33​, what are DC and​ CM?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!