Angela wants to know how many families in her neighborhood plan to attend the parade. She puts all 120 of the neighborhood addresses in a hat and draws a random sample of 30 addresses. She then asks those families if they plan to attend the parade. She finds that 40% of the families plan to attend the parade. She claims that 40% of the neighborhood families would be expected to attend the parade. Is this a valid inference? (5 points)

A) Yes, this is a valid inference because the 30 families speak for the whole neighborhood

B) Yes, this is a valid inference because she took a random sample of the neighborhood

C) No, this is not a valid inference because she did not take a random sample of the neighborhood

D) No, this is not a valid inference because she asked only 30 families

Answers

Answer 1
Your answer should be A
Answer 2
the answer would be b

Related Questions

Answer choices
a
b
c
d

Answers

Answer:

Either A or D

Step-by-step explanation:

I got It right Hope it helps this you guys

PLEASE HELP (15 POINTS!!) PLEASE ​

Answers

Answer:

(4,9)

Step-by-step explanation:

To solve this, you can use substitution or elimination. In this case I would use substitution. To do this, you have to isolate a variable. x is already isolated so we can skip this step. plug x into 5x-7y=-43. This will make the equation 5(2y-14)-7y=-43. Simplify this to get 10y-70-7y=-43. Simplify this to get 3y-70=-43. Add 70 in both sides to isolate y. This will make the equation 3y=27. Divide both sides by 3 to make y equal to 1. This will make the equation y=9. Now you know that y=9. Plug 9 into any equation. x=2(9)-14. Simplify this to get x=18-14. x=4. Now put the numbers as an ordered pair which is (x,y). We know that x=4 and y=9 so it is (4,9).

If this answer has helped you please mark as brainliest.

Answer:

Where are you from ??

Step-by-step explanation:

From New Zealand ??

Why do you think gas stations often quote a price per gallon that ends in 9/10 of a cent? Do you think this is an appropriate use of fractions? Why or why not?​

Answers

The practice of tacking 9/10 of a cent on the end of a gas price goes back to when gas cost only pennies per gallon and was a tax imposed by state and federal governments. Gas stations added the fraction of a cent on the end of the price instead of rounding up the price.

Tengo que leerme un libro de 1267 páginas en 3 semanas. La primera semana he leído 189 páginas y la segunda el triple que en la primera, ¿cuántas páginas me quedan por leer en la tercera semana?

Answers

Answer:

Quedan 511 páginas por leer en la tercera semana.

Step-by-step explanation:

Si el libro tiene 1267 y debe leerse en 3 semanas, se ha leído 189 páginas en la primera semana y 567 páginas en la segunda semana, es decir, el triple del número de páginas leídas en la semana anterior, la cantidad de páginas por leer para la tercera se determina mediante la siguiente sustracción:

[tex]x = 1267 - 189 - 567[/tex]

[tex]x = 511[/tex]

Quedan 511 páginas por leer en la tercera semana.

Classify the triangle by its sides and angles

Answers

Answer:

Obtuse Scalene Triangle

Give me Brainliest if I'm correct , please ! :)

What is the surface area of the rectangular pyramid below?

Answers

Answer: 363

Step-by-step explanation:

First you’d do 11 X 11=121 divide by 2 and get 60.5 X 4 (Because there are for triangle sides) and get 242 plus the rectangular base 11X11=121+242=363

i need help on this problem with steps please :((

Answers

Answer:

Log (1/x) = –0.9925

Step-by-step explanation:

From the question given above, the following data were obtained:

Log x = 0.9925

Log (1/x) =?

Recall,

Log (M/N) = log M – Log N

Thus,

Log (1/x) = Log 1 – Log x

Recall

Log 1 = 0

Log x = 0.9925

Thus,

Log (1/x) = Log 1 – Log x

Log (1/x) = 0 – 0.9925

Log (1/x) = –0.9925

In which direction does the left side of the graph of this function point?
f(x)= -x4- x2 + 4x - 2

Answers

the graph would be pointing down.

PLEASE PLEASE PLEASE HELP ME!!!!!!!!!!
Point (4, –5) is mapped onto ________ when rotated 90° clockwise about the origin.
A)

(5, –4)

B)

(–5, 4)

C)

(5, 4)

D)

(–5, –4)

Answers

Answer:

D. (-5, -4)

Step-by-step explanation:

When making a rotation 90° clockwise, the coordinates will swap places. However, the x value will be the opposite and the y value will stay the same.

90° clockwise rule:

(x, y) ---> (y, -x)

(4, -5) ---> (-5, -4)

Hope this helps!!

solve the equation 15s-100=350 to find the number of t shirts Rory sold

Answers

Answer:

s=30

Step-by-step explanation:

15s-100=350 =>15s=350+100 =>15s=450 => s=450/15 = 30 => s=30

Have a nice day !

Phil melange 0.2L de jus de pomme teneur en fruit 25% et 0.1L de jus d'orange teneur de fruit 50% quel est la teneur en fruit de son cocktail

Answers

Answer:

10%

Step-by-step explanation:

La teneur en fruits de son cocktail est calculée comme suit:

25% de jus de pomme 0.2L + 50% de jus d'orange 0.1L

0.25 × 0.2 + 0.5 × 0.1

0.05 + 0.05

= 0.10

Conversion en pourcentage

= 0.10 × 100%

= 10%

Par conséquent, la teneur en fruits de son cocktail est de 10%

Find the value of x
(2x+12)

Answers

Answer:

[tex]2x + 12 = \frac{180}{2} = 90 \\ 2x = 78 \\ x = 39[/tex]

[tex]3x^3 - 7x^2 \ x[/tex]

Answers

x(3x^2-7x+1)
You can only factor out a “x”


Given that BCD and BCA form a straight angle, if BAC measures 40 degrees and BCD measures 75 degrees, then the measure of ABC is ___ degrees.

Answers

Answer:

∠ABC= 35°

Step-by-step explanation:

im not sure if u need explanation but comment if u do

Factor in this expression 6z ^ 4 - 4 + 9(y ^ 3 + 3)

Answers

Answer:

 6z ^ 4-4 is a factor

Step-by-step explanation:

Given data

6z ^ 4 - 4 + 9(y ^ 3 + 3)

open bracket

6z ^ 4 - 4 + 9y ^ 3 + 27

collect like terms

6z ^ 4+9y^3 - 4 +27

6z ^ 4+9y^3 - 23

From the above expression  6z ^ 4-4

Answer:

its a.

(y^3+3)

Step-by-step explanation:

common sense

What would be the answer?

Answers

Answer:

6

Step-by-step explanation:

To breakeven means that you made exactly as much money as you spent, so if you spent $50 to make lemonade, you would need to make $50 in profits from selling to break even

first subtract the cost of making each horse from the price of selling each horse (you do this to find out how much profits he makes from one horse):

125 - 75 = 50

now divide 300 by 50 to find out how many horses need to be made to break even:

300 ÷ 50 = 6

The answer is Would be D. He would need to sell 6 to break even

In ΔPQR, what is the m∠Q? Enter your answer in the box.

Answers

Answer:

105°

Step-by-step explanation:

11x-5 + 6x+5 + x = 180

18x = 180

x = 10

m∠Q = 11(10)-5 = 110-5 = 105°

Answer:

105.

I hope you have a good day :)

This is the beginning of Antoine's construction. What is he trying to construct?

Select the BEST answer choice. (See Photo)

a. Perpendicular bisectors
b. Angle bisectors
c. Inscribed circle
d. Circumscribed circle

Answers

Answer:

option C

Step-by-step explanation:

A recent taste test showed that 85% of people liked a new chicken sandwich recently added to a restaurant’s menu. The restaurant manager claimed that only 68% liked the new sandwich. To determine whether this sample supports the population proportion of 0.85, a simulation of 100 trials is run, each with a sample size of 30 and a point estimate of 0.85. The minimum sample proportion from the simulation was 0.66 and the maximum sample proportion from the simulation was 0.88.


a) Estimate the margin of error using the half the range method.


b) Use your margin of error to find the interval estimate.


c) Based on the computed interval estimate, is the restaurant manager’s claim that 68% of people liked the new sandwich valid? Explain your answer.

Answers

Answer:

a) The margin of error = 0.11

b) The interval estimate = (0.74, 0.96)

c) Not valid because 68% = 0.68 is less than the values in the interval estimate

Step-by-step explanation:

The statistical data from the population and the simulation are;

The percentage of the people that liked the new chicken sandwich = 85% = The population proportion

The percentage the restaurant manager claims liked the new sandwich = 68%

The number of trials of the simulation = 100 trials

The sample size of each trial = 30

The point estimate of each trial = 0.85

The minimum sample proportion = 0.66

The maximum sample proportion = 0.88

a) The confidence interval = (0.66, 0.88)

By the half the range method, the margin of error is given by half the width of the confidence interval

∴ The margin of error, MOE = (0.88 - 0.66)/2 = 0.11

b) The interval estimate are the expected range of numbers for a parameters

The interval estimate = The point estimate ± MOE

∴ The interval estimate = 0.85 ± 0.11 = (0.74, 0.96)

Given that the manager's claim of 68% is not within the interval estimate, the manager's claim is not valid based on the expected values for the people that liked the new sandwich found with the point estimate and the margin of error

30% of which number is 3?

Answers

Answer:

10

Step-by-step explanation:

30/100*x=3

Multiply both sides by 100 and divide both by 30

You get the answer x=10

Answer:

10

Step-by-step explanation:

DO this 3x100/30 and you get 10

Please help 35 points
100 75 50 25

Answers

Answer:

50

Step-by-step explanation:

every 50 points it takes 1 hr

Find 2 points

I’ll use (1,75) and (3,175)

Slope = change in y over the change in x

Slope = (175-75)/(3-1)

Slope = 100/2

Slope = 50

Find the diameter of the object.

diameter: ___ cm

Answers

Answer: 1 1/5

Step-by-step explanation: So the diameter is the length of the whole sphere and since half of this is 3/5 you at times that by two and you would get 1 1/5

Answer:

30cm

Step-by-step explanation:

Diameter of circle= 2×radius

2×⅗

30cm

hope it helps

PLS ANSWER FAST I DONT HAVE MUCH TIME!!!!!

Answers

The answer is B. C=2.50r+9
B









……………………..hfscbigds

no links will mark BRAINLIEST​

Answers

Answer:

1 = natural numbers

2 = 1

3 = 0

4 = -7/5

5 = NO

6 = 1 and -1

7 = 1/5

8 = x

The volume of a box in the shape of a rectangular prism
is 30 cubic inches. The width of the box is 2 inches less
than the length. The height is 3 inches less than the length.
Find the length (in inches) of the box.

Answers

Answer: 12

Step-by-step explanation:

In the diagram of right triangle ABC shown below, AC = 59 and length of x, to the nearest tenth.

Answers

Answer:

ɨ ċaռ't ɛxքʟaɨռ ɮʊt ɨt ɨs aċ=59x2

Someone plsss HELP ME

Answers

Answer:

[tex]2,8,6,18[/tex]

Step-by-step explanation:

Coordinates are written in [tex](x,y)[/tex] form. In a function, this translates to (input, output). Therefore, in these four coordinates, the four outputs are 2, 8, 6, and 18.

Help me figure out the two way table

Answers

Fill in the given information then calculate the missing parts. See attached picture

Help a bab out with Geometry ☹️?

Answers

Answer:

1/3*9.7*pi7.6^2ft^3

Step-by-step explanation:

Then round to the nearest hundred,

=586.7ft^3

AJKL has vertices at the points (2.5,3) K(3.2,- 4.7), and (-6.9.3). Find the slope of side 1
DA
A undefined
B. -11
C. -0.76
D. 0

Answers

Answer:

[tex]S_{DA}=-11[/tex]

Step-by-step explanation:

From the question we are told that:

The Vertices points for DAN

[tex]D= (2.5,3)[/tex]

[tex]A=(3.2,- 4.7)[/tex]

[tex]N=(-6.9.3)[/tex]

Generally the equation for slope of DA [tex]S_{DA}[/tex] is mathematically given by

 [tex]S_{DA}=\frac{y_2-y_1}{x_2-x_1}[/tex]

 [tex]S_{DA}=\frac{-4.7-3}{3.2-2.5}[/tex]

 [tex]S_{DA}=-11[/tex]

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