22. According to ghost hunters, large cities have, on average, 9 haunted houses each. As far as we know, it is unpredictable which houses will be haunted; and just because one house is haunted, that does not mean any of its neighbors will or will not be haunted. a) What is the standard deviation of the number of haunted houses in a large city

Answers

Answer 1

Answer:

The standard deviation of the number of haunted houses in a large city is 3.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

[tex]P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}[/tex]

In which

x is the number of sucesses

e = 2.71828 is the Euler number

[tex]\mu[/tex] is the mean in the given interval, which is the same as the variance.

According to ghost hunters, large cities have, on average, 9 haunted houses each.

This means that [tex]\mu = 9[/tex]

a) What is the standard deviation of the number of haunted houses in a large city?

Square root of the variance, so:

[tex]\sqrt{9} = 3[/tex]

The standard deviation of the number of haunted houses in a large city is 3.


Related Questions

What are the solutions to the following equation?
[m] = 8.5
The value of m is equal to 8.5 and
because each distance from zero is 8.5.

Answers

Answer: -8.5

Step-by-step explanation:

I got it right on edg

Answer -8.5

Step-by-step explanation:

Polygon A has an area of 18 square feet and Polygon B has an area of 98 square feet. If the two polygons are similar, and Polygon B has a side length of 14 feet, find the corresponding side length in Polygon A.

Answers

Answer:

6 feet

Step-by-step explanation:

Let the length of side length in polygon A be represented by x. Since the two polygons are similar, then it can be deduced that;

Area scale factor = [tex](linear scale factor)^{2}[/tex]

linear scale factor = [tex]\sqrt{Area scale factor}[/tex]

Area scale factor = [tex]\frac{98}{18}[/tex]

So that,

linear scale factor = [tex]\sqrt{\frac{98}{18} }[/tex]

                              = 2.3333

The length of side of polygon A = [tex]\frac{14}{2.3333}[/tex]

                                       = 6.0085

Therefore, the corresponding side length of polygon A is 6 feet.

Russell wants to buy three ties and a belt and must spend no more than $80.00. The belt costs $28.50. If the three ties are the same price, then how much can he pay for each tie

Answers

Answer: $17.16

Explanation: do you have to start by subtracting the cost of the belt from the total budget: 80-28.5= 51.5. Then you can divide the remaining money by three because he’s buying three ties: 51.5/3≈ $17.16

Answer:$17.16

Step-by-step explanation:

do you have to start by subtracting the cost of the belt from the total budget: 80-28.5= 51.5. Then you can divide the remaining money by three because he’s buying three ties: 51.5/3≈ $17.16

ANSWER QUICK PLEASE
The city of Eastville has 32,000 people and the city of Lakeside has 56,000 people. Eatsville is gaining 600 people each year. Lakeside is losing 1000 people each year. How many years will it take for both cities to have the same amount of residents?

Answers

Answer:

15 years

Step-by-step explanation:

Create an equation where x is the number of years

32,000 + 600x = 56,000 - 1000x

Solve for x:

600x = 24,000 - 1000x

1600x = 24,000

x = 15

So, it will take 15 years for both cities to have the same number of residents

Answer: answer is x=15

Step-by-step explanation:

Does the graph show a proportional relationship between time and the total charge? Explain.

Answers

It does, as there is a linear increase with a slope.

i will give you brainliest whoever answers correct first!!

Answers

5/14 I think don’t take my word for it tho

Using two or more complete sentences, describe and correct the error in the solution.

Solve the system of equations.

3x - 2y = 2

9x - 6y = 6

3x - 2y = 2 → 9x - 2y = 6
9x - 6y = 6 → 9x - 6y = 6
-8y = 12
y = 1.5
3x - 2y = 2 → 3x - 2(1.5) = 6
3x - 3 = 6
3x = 9
x = 3​

Answers

Answer:

In the very first step, when they multiply both sides by 3 the -2y should become -6y but instead it stays as -2y. The correct solution would be:

9x - 6y  =6

9x - 6y = 6

0 = 0

This means there are infinite solutions.

the positive integer N is the smallest one whos digits add to 41. what is the sum digits of N+2021​

Answers

Answer:

use this videos to help you

The table shows the number of words per minute Josylyn can type. What is the missing value?

Answers

Answer:

52

Step-by-step explanation:

First, we want to see how we get from 104 to 156.

Looks like we add 52 to get the next.

104 + 52 = 156

156 + 52 = 208

Logically if we want to go back, we simply subtract 52.

104 - 52 = 52

Answer:

52

Step-by-step explanation:

Help help please !!!!!! Thank u ❤️

Answers

Answer:

Middle bar

Step-by-step explanation:

6 + 4 = 10

10 + 5 = 15

Can someone please help me..

Answers

Have a good day/night

Can someone help meee

Answers

Answer:

69

the measure of angle will

111 + AXB = 180

AXB = 180 - 111

AXB = 69

hope it helps

Answer:

angle AXB= 180-111=69°

Step-by-step explanation:

The price of a 9-minute phone call is $1.35. What is the price of an 11-minute phone call?

Answers

Answer:

$1.65

Step-by-step explanation:

[tex]\frac{1.35}{9}[/tex] = $0.15 per 1 min

11 x $0.15 = $1.65

Answer:

Its .15$ for 1 minute so for 11 minute it is 1.65$

Step-by-step explanation:

1.35/9=.15

.15*11=1.65

Hope this helps :)

A bus can hold a total of 60 students. The bus is 73% full how many students are on the bus?​

Answers

Answer:

44

Step-by-step explanation:

so youre looking for 73% of students rite? of means multiplication , you just times 73% by 60

73%*60=43.8

but there cant be point 8 of a person unless theyre missin a couple limbs, so you round up to 44!

hope it helps :)

44
---------------------

Ellie shares 24 cupcakes with x friends, how many cupcakes does each friend get?

Answers

Answer:

24/ 1 + x

you would have to divide the cupcakes upon the friends.

What is the answer?
A)44
B)42
C)45
D)48

Answers

Answer:

44

Step-by-step explanation:

Answer:

d

Step-by-step explanation:

because you take 3 pulse 2

OLZ HELP 15 points WILL MARK BRAINLIEST IF CORRECT

Which expressions are equivalent to 9+h+(j+k)? Check all that apply.
9+(1+y)+k
(g+h) +jk
(g+n) +j+k
9+(hj)+k
gh+jk
(h+])
9+h(j+k)

Answers

Answer:

[tex]9+h+(j+k) = 9+(h+j)+k[/tex]

[tex]9+h+(j+k) = (9+h)+j+k[/tex]

Step-by-step explanation:

Given

[tex]9+h+(j+k)[/tex]

Required

Determine equivalent expressions

To do this, we simply make use of associative property.

So, we have:

[tex]9+h+(j+k) = 9+(h+j)+k[/tex]

or

[tex]9+h+(j+k) = (9+h)+j+k[/tex]

2^2x - 6(2^x) + 5 = 0

Answers

Answer:

can you please write the expression with the mathematical symbols. I can't understand what you mean by (^). do you mean that number is raised to that symbol or are you're trying to multiply. if you don't know how to write exactly how it's given, attach a picture of your question.

Step-by-step explanation:

If the slope between the points (-5,7) and (4,x) is 1, then
what is the value of x?

Answers

9514 1404 393

Answer:

  16

Step-by-step explanation:

The equation of a line with slope m=1 through the point (h, k) = (-5, 7) will be ...

  y -k = m(x -h)

  y -7 = x +5

  y = x +12

Then for x = 4, the value of y is ...

  y = 4 +12 = 16

The point is (4, x) = (4, 16), so x = 16.

Answer:

16

Step-by-step explanation:

Given that the slope of the line is 1 . And it passes through the points (-5,7) and (4,x) .We know that slope is difference of ordinate by difference of abssica . So that ,

[tex]\implies Slope =\dfrac{y_2-y_1}{x_2-x_1}\\\\\implies 1 =\dfrac{ 7-x}{-5-4} \\\\\implies 1 \times -9 = 7-x \\\\\implies -9 -7 = -x \\\\\implies \underline{\underline{ x = 16 }}[/tex]

Hence the required answer is 16 .

Action game rental charges $25 membership fee at eight to rent a video game Bob’s easy game rental charge is $13 to rent a video game if you run in the same number of games from each business after running how many games with the overall cost be less for action game rental

Answers

division is 1.92307692308

multiply is 325

PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!

Answers

Answer:

I believe this question should be one solution

Step-by-step explanation:

Hope this Helped

PLEASE HELP!
Which figure has the smaller volume, the cone with a diameter of 7 in. and a height of 5 in. or the sphere with a diameter
of 5 in.?
A. Sphere
B. Cone

Answers

Answer:

(A) Sphere

Step-by-step explanation:

The sphere has a smaller volume.

please help i dont get it​

Answers

Answer:

i got y = 5x but not sure

Step-by-step explanation:

2. The actual tree on the left is 10 feet tall. The model tree on the right is 8 inches tall. What is the scale factor?
A: 15 B: 112 C: 1/122 D: 1/15

Answers

Answer:

D. 1/15

Step-by-step explanation:

Actual tree = 10 ft = 12 × 10 = 120 in.

Model tree = 8 in.

Scale factor = model tree/actual tree

Scale factor = 8/120

Scale factor = 1/15

5.
0.5, 1.4, 3.0, 7.0, 0.5, 1.8, 0.5
Mean
Median
Mode

Answers

Answer: mean- 2.1

Median- 1.4

Mode- 0.5

Step-by-step explanation:

Find the area of the triangle. Round your answer to the nearest 10th. 10 6​

Answers

Answer:

the answer is 30. you will get 30 for your answer

work out the area of this sem​

Answers

Answer:

I’m not sure if this is free points or a question but the question is not clear

Step-by-step explanation:

Answer:  Uhmm where is the problem?

3 tons of cement cost $780.00. What is the price per pound?​

Answers

Answer:

$260

Step-by-step explanation:

Divide $780.00 by 3.

780 ÷ 3 = $260

1) Solve for x
4x + 3 = 3x - 5
A) 8
C) -8
D) 2
B) -2

Answers

4x+3=3x-5
X= -8
C) -8

What is the area enclosed by the curves???

Answers

the x and y axis
i think
It is 1/2 for sure , look at the photo
Other Questions
Which improper fraction is equivalent to 15 3/7 Can someone answer this Which of the following statements is FALSE?a.Taking away the right to vote did not have much impact on other rights of African Americans.b.White supremacy groups rely on violence and intimidation to achieve their goals.c.Jim Crow Laws enforced segregation and increased racism.d.Black Codes attempted to reinstate slavery in the South after the Civil War.Please select the best answer from the choices provided A 12 kg object is moving at 10 m/s to the right. It collides with a 20 kg object moving at 7m/s to the right. What speed will the objects move together after they collide and sticktogether?*a) 5.27 m/sb) 08.13 m/sc) 3 m/sd) 17.23 m/s HelpVosotras nunca ___ ! (ponerse de acuerdo)Mi primo Esteban y yo usualmente ___ inmediatamente despus de una discusin. (reconciliarse)Nosotras ___ las mochilas por accidente. (intercambiarse)La pareja ___ con pequeos regalos todo el tiempo. (sorprenderse)Chiqui y Marco ___ siempre que ___. (abrazarse) (verse)Los novios ___ textos cada tres minutos, todo el da, todos los das! Es demasiado! (escribirse)Nosotros ___ siempre con mucho cario. (besarse)Los recin casados no ___ muy bien todava. (conocerse)Carli y yo ___ a menudo en el caf de la esquina. (encontrarse)Mi mam y mi pap todava ___ con amor. (mirarse)Ellas ___ todo! (contarse) IS it necessary to eat oranges to stay healthy? A bag contains 100 marbles: 30 are red, 25 are green, 15 are blue, 7 are yellow, and the rest are orange.Consider the following events, and then answer the question.Event A: drawing a green marbleEvent B: drawing a purple marbleEvent C: drawing a red marbleEvent D: drawing a yellow marbleWhich probability is the smallest? What is the chemical that comes from the breakdown of proteins and must be eliminated? Jenna did 5 sit-ups on Saturday, 7 sit-ups on Sunday, 10 sit-ups on Monday, 14 sit-ups on Tuesday, and 19 sit-ups on Wednesday. If this pattern continues, how many sit-ups will Jenna do on Thursday? Help please I give brainliest The area of a poster board is (x2 + 9x - 10) square inches. Find the dimensions of the poster board Ifx = 15. (outsiders)5. Why is Dally upset about Johnny's decision? The specific heat of water is 4.186 J g-1 C-1. What is the amount of energy, in J, required to heat 10.00 g of water 20.00 C? could you help me on number 8 please what is a teaches dream job It is acceptable to allow up to eight hours for cooling food from 135 to 70 degrees F.FalseTrue Legislative Branch - Web QuestDirections: Use the links below to complete the following questions. Write your answers on a separatepaper. Your Web Quest is due tomorrow at the beginning of class. Good Luck!Links1) House of Representatives: http://www.house.gov/2) Senate: http://www.senate.gov/index.htm2) Clerk of the House of Representatives: http://clerk.house.gov/3) Library of Congress: https://www.congress.gov/4) Congressional Members: congress.orgStructure of CongressSection A--Fill in the blank activity: fill in the blanks below. Provide the names, party affiliation, and steach member in the Congress. Identify the role of each leadership position listed.*Speaker of the House -Role:*House Majority Leader -Role:*House Majority whip -Role:*House Minority Leader-Role:House Minority whip -Role:Senate Majority LeaderRole:Senate Majority whip - how did the nazi party begin? In figure 5, what are the values of x and y?(4x - 12)(7y+12)(12x+8) Determine the rate of oxygen consumption at each temperature for comparison. Then divide the higher rate by the lower rate to obtain the difference (ratio) between the two temperatures. Round your answer to the nearest 0.1. It can be concluded that mouse respiratory rate (increases or decreases) when temperature is lowered. In this experiment there was a fold difference in respiratory rate at the two temperatures.